WooHoo

WooHoo is used in The Sims 2 and The Sims 3 as a euphemism for sexual intercourse. If cinematics are enabled in The Sims 2, then there will be a comic animation involving fireworks the first time a Sim WooHoos with another.

In The Sims 2, Sims remember their first WooHoo, and also remember all the Sims they WooHoo with.

WooHoo interactions can be carried out between two Sims, regardless of gender, that have a very high relationship score. In The Sims 3, Sims don't need to have such a high relationship score in order to be able to WooHoo. During conversation, the other Sim must find them "Extremely Irresistible" in order for the options of WooHoo and/or Try for Baby to appear.

Play in Bed was present in The Sims: Livin' Large, as a precursor of WooHoo. Sims could also "play" in the two-person hot tubs from Hot Date and Vacation.

Having WooHoo will boost the Social and Fun bars (even if testingcheatsenabled is being used to slide the bars down) of both Sims. In The Sims 3, it will often lead to an 8 hour "Having a Blast!" moodlet for both Sims.

While Sims can WooHoo without trying for a baby, and without risk of pregnancy, the "Try for Baby" action is also WooHoo. In The Sims 2, trying for a baby will fulfill the want to WooHoo. If it's also one Sim's "first time" with the other, that Sim will get a memory of having had WooHoo.

Where Sims Woohoo
The WooHoo interaction is possible in these locations:

The Sims 2

 * In bed
 * In a hot tub
 * In a changing booth (Public WooHoo)
 * In a Car
 * While WooHoo normally boosts Sims' Fun motive, WooHoo in a car does not appear to do so.
 * In a photo booth (Public WooHoo)
 * In an elevator (Public WooHoo)
 * In a tent
 * In a sauna (Public WooHoo)
 * In a hammock
 * In a helicopter
 * In a closet
 * In a pirate ship
 * In The Sims 2, Public WooHoo is a form of WooHoo that is done using the specific indicated objects on a community lot. Sims may have wants to have Public WooHoo. Public WooHoo gives a specific memory, and other Sims on the lot will react to it.

The Sims 3

 * Bed
 * Rabbit holes (must tour inside one first): military base, theater, science lab, city hall, film studio, and Vault of Antiquity
 * Tent
 * Sarcophagus
 * Time machine
 * Hot tub
 * Elevator
 * Actor trailer
 * Shower
 * Treehouse
 * Haystack
 * Photo booth
 * Box of Mystery
 * Magical wardrobe
 * Fairy house
 * Gypsy caravan
 * Sauna
 * Igloo
 * Pile of leaves
 * Hot air balloon
 * Murphy bed
 * All-in-one bathroom
 * Underwater cave
 * Resort tower
 * Jetpack
 * Bot workshop
 * ZEPHYR
 * Restorable car

In The Sims 3: World Adventures, after you have installed it and updated it, after a WooHoo, the two Sims will crawl out of the bed, think of each other, and pump their fists in the air while saying "Woo!". This means they had a fun time during the WooHoo.

In The Sims 3, there have been accounts of "Friends with Benefits", where two Sims could woohoo without becoming a love interest. In The Sims 3, it is possible to have "Friends with Benefits" without World Adventures. The two Sims would need to be good friends, and then tour a building mentioned above together. The option to WooHoo appears without them being love interests, though they will not have the same reaction as they do in World Adventures.

If The Sims 3: Generations is installed, after a WooHoo between two Sims, either Sim may do a fancy walk, similar to how an Imaginary Friend walks. This happens when a Sim WooHoos on a community lot or another Sims' house.

In Showtime, doing WooHoo inside a photo booth will consider Sims to be WooHooing in the public and gives them "Public WooHoo" moodlet, even if it's done at home.

Try for baby
A male and female Sim can alternatively initiate the "Try for Baby" interaction to conceive a baby. In The Sims 2, the female Sim must be on her home lot or controllable on a community lot. In The Sims 3, the female Sim does not need to be on her home lot to try for a baby.

Trying for a baby carries a chance of conception depending on where it was done.
 * 20% in a photo booth
 * 25% in a hot tub
 * 40% in a sauna and all-in-one bathroom
 * 50% in a clothing booth and other places not listed here in The Sims 3.
 * 55% in a time machine and underwater cave
 * 60% in a bed
 * 65% in an elevator
 * 75% in a bed and sarcophagus
 * 100% on the Heart-shaped bed

Additional chance of conception is increased by certain conditions, as following.
 * +20% when Sims try for baby in full moon
 * +25% for each Sim who has Fertility Treatment lifetime reward or "A Twinkle in the Eye" moodlet, from Procreation Elixir. The effect doesn't stack if one Sim has both the lifetime reward and the moodlet.
 * +50% for each Sim who has the "Magic in the Air" moodlet, from talking to baby's breath in Arboretum.
 * +100% for each Sim who has the "Feeling Fertile" moodlet, from genie wish for large family.

In The Sims 2, "Try for baby" is not possible for an adult female who is less than 5 days away from becoming an elder. An adult female who is 5 days away from becoming an elder may be able to "Try for Baby" for part of that day. In The Sims 2: University, "Try for Baby" is not possible for a young adult female. Young Adults can "Try for Baby" in The Sims 3 and Young Adult females are more fertile than Adult females; i.e. there is a greater chance for twins and triplets to occur. In The Sims 3, if a Sim becomes pregnant directly before becoming an elder, then the process of aging is simply suspended until after the baby is born.

If the lot already has 8 controllable Sims on it, the "Try for Baby" option will not appear. Zombies, Mummies, Servos, and SimBots do not have the "Try for Baby" interaction. Without hacks or mods, only male/female couples can try for a baby. A male between the ages of Young Adult and Elder can impregnate a female.

Without cheats, male Sims can only be impregnated by aliens. This can occur if they "Stargaze" with the more expensive telescope at night, though it is very unlikely to happen. However, if FreeTime or later is installed, any Sim who has Knowledge as their primary aspiration, and who has enough Lifetime Aspiration points, can choose Summon aliens as an aspiration benefit. A Sim with this benefit can use any telescope to attempt to summon aliens, and will have a higher chance of being abducted. Therefore, an adult male Sim with this benefit can, more or less, try for an alien-hybrid baby.

The "Try for Baby" option does not exist in The Sims Medieval. In The Sims Medieval, Woohoo between two Sims of the opposite gender always carries a chance of pregnancy.

Gender and Age compatibility
The following table shows the compatibility of various age groups and genders for WooHoo/baby interactions. Note: when referring to trying for a baby, the table only states the possibilities for the interaction.

As with all other romantic interactions, blood relatives, and Sims age teen and younger are automatically prevented from WooHooing (although there are hacks that allow both groups to do this, with the exception of Sims younger than teen). Furthermore, because of its wide-ranging implications, WooHoo is never autonomous, except through the use of a hack known as Autonomous Casual Romance, which can be found on Simbology. unzip 1 unzip 2.

Also, another mod on Simbology allows same-sex couples to Try For Baby; the Sim that initiates the action will be considered the "mother."

Pets
Pets can WooHoo in order to breed (producing a litter of up to 4 puppies or kittens), but they require a Sim that has a good relationship with at least one of the pets to direct them, and the pets obviously must have a good relationship. The gestation period is approx. 72 game hours, just like Sims. If pets have a bad relationship with the other pet, they will refuse the action and go off on their own for a bit sometimes.