Comfort has its own section in the buy mode catalog. It contains dining chairs, living chairs, sofas, and beds—items that affect a Sim's comfort motive.
If a Sim has been standing up for too long, his or her Comfort meter will drop. Though it is not as important as the hunger meter, Sims who become uncomfortable will become grumpy and irritable. Sitting down and relaxing is a quick and easy way of replenishing the Comfort meter, as is going to bed. Taking baths and hot tubbing will also improve comfort. Even if a Sim is reading, watching television, or playing the piano, their comfort level will rise as long as they are sitting down. Of course, different chairs, beds and baths will increase the Comfort level at different rates; for example, the Werkbunnst All Purpose Chair[TS] Will not raise comfort motive
In places such as Downtown and Old Town, there are benches for Sims to sit down and relax, but don't raise comfort levels as much. There will often be more comfortable chairs or sofas for them to sit on, but even then, Sims in The Sims will often wander off autonomously. This is slightly improved in The Sims 2, as Sims are more likely to sit autonomously when Comfort is down, and to remain sitting long enough to recover some of the comfort motive.
Bathtubs in The Sims 2 allow Sims to take bubble baths, which increase comfort more than regular baths. Sims can also take bubble baths in The Sims 3, but must first buy bubble bath. Massages in The Sims: Superstar and The Sims 2: Bon Voyage are another way Sims get comfortable.
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