WooHoo

WooHoo is used in The Sims 2 as a euphemism for sexual intercourse. WooHoo interactions can be carried out between two Sims, regardless of gender, that have a very high relationship score - so high, in fact, that newly-created married couples quite often can't even access it right off the bat without a little foreplay (hey it's an adult topic).

Sims remember all the Sims they WooHoo with, but it's also exceptionally likely to lead to jealousy in relationships. Sims will also have a memory of their very first WooHoo.

Where Sims Woohoo
WooHooing is possible in several locations:

Base game: Nightlife: Open For Business: Bon Voyage:
 * From relaxing together on a bed;
 * In a hot tub;
 * In a changing booth (Public WooHoo);
 * In a Car;
 * In a photo booth;
 * In an elevator;
 * In a tent;
 * In a sauna;
 * In a hammock.

Try for baby
A male and female sim can alternatively Try for baby, if the female sim is either on her home lot or on a community lot and controllable. Trying for baby carries a 60% chance of pregnancy, while sims will have only a small chance if justt woohooing in order to get pregenant. Gay couples won't be able to try for a baby (unless certain third-party hacks are used in the game), so instead they can call the adoption agency.

Gender and Age compatibility
The following table shows the compatibility of various age groups and genders for WooHoo/baby interactions. Note that, when referring to trying for a baby, the table only states the possibilities for the interaction. As stated above, there are certain situations in which Sims who are able to have a baby together cannot try. It also makes the assumption, of course, that no hacks have been used - hacks do exist for teen WooHoo, and even teenage pregnancy!

Trying for baby is not possible for an adult female who is within a few days of becoming an elder.

As with all romantic interactions, blood relatives are automatically prevented from WooHooing. Furthermore, because of its wide-ranging implications, WooHoo is never autonomous.

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 obviously the pets must have a good relationship. The gestation period is approx. 72 game hours, just like Sims.