Bladder

"When a Sim's gotta go, a Sim's gotta go. And there's really only one solution to that kind of problem—get them to a toilet as fast as possible."

- The Sims 2 Bladder is a basic motive for Sims, pets and other life states in The Sims series. The bladder motive gradually decreases throughout the day, but decreases faster when eating or drinking. Using a toilet or other designated object causes the bladder motive to rise (i.e. relieves the need). If bladder is ignored, it will eventually become urgently low, and an accident can occur if the need is not resolved soon enough.

The bladder motive does not exist in The Sims Medieval, although using a chamberpot grants a temporary buff. The Sims 2: Castaway features a bladder motive, although Sims will not have an accident if it drops too low; instead, they will produce a roll of toilet paper and a changing booth to do their business in.

Function
The bladder motive decreases naturally throughout the day, and can be increased by going to the toilet. Babies and toddlers will soil their diapers when the bladder motive drops too low, although toddlers can be potty trained using a potty chair by older Sims. For males, the level of the bladder meter controls whether they sit or stand while using the toilet.

If a Sim's bladder starts to get full, they become extremely cranky; when it gets to the red, they make a wild dash for the toilet with urgency, and if they can't get there in time, the poor Sim has an embarrassing accident on the floor, which will leave a puddle on the ground and severely affect the Sim's hygiene. In The Sims and The Sims 2, drinking a cup of coffee can make the bladder meter decrease. In The Sims 3 and The Sims 4, drinking anything decreases the bladder meter. Howling werewolves will decrease the bladder meters of any non-werewolves around them. In The Sims 2, elder Sims will take longer to use the toilet than adults do, and their bladder motive will decay more quickly. Pregnancy will also cause a Sim's bladder motive to decay more quickly.

As a rule, community lots will have public toilets of some sort. These will include urinals and toilet stalls, the former of which can only be used by males. In The Sims 2, knowledge Sims and/or neat Sims may occasionally have a minor fear of using a public toilet. "Having an accident" is a fear in The Sims 2, though it takes away more influence than aspiration.

In The Sims 2, outgoing and sloppy Sims are also able to "use" shrubs and the AquaGreen Hydroponic Garden to relieve their bladder needs. Sloppy Sims will also pee while taking a shower if their bladder need is low enough. Sims that wet themselves during a party will get the "Had an Accident at a Party" memory. In The Sims 4: Get Together and The Sims 4: Jungle Adventure, children and older Sims can use bushes to relieve their bladder motive.

Associated memories
In The Sims 2, bladder failure can be associated with two negative memories.

The Sims 3
In The Sims 3, the Steel Bladder lifetime reward makes it so that Sim who purchased it no longer has to use the bathroom again. Sims will wet themselves if the "Really has to Pee" moodlet expires and gain an "Embarrassed" moodlet for wetting themselves, which gives -20 mood for 3 hours; and their hygiene drops to 0.

The Sims 4
In The Sims 4 Sims will likewise wet themselves when the "Really Has To Pee" moodlet expires, and will then get the "Peed Self" moodlet and be very embarrassed for 4 hours. Sims that wet themselves in a swimming pool get a special positive moodlet instead.

The Steel Bladder trait can be bought from the satisfaction reward store for 2,000 satisfaction points. It prevents the bladder need from going down normally. However, it is still possible for the meter to go down by drinking.

Bladder and other life states

 * For SimBots, the equivalent of bladder is Waste Buildup. Servos and Plumbots do not have a bladder motive.
 * PlantSims do not have a bladder motive.
 * Mummies do not have a bladder motive.
 * Vampires do not have a bladder motive.

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