I started noticing this in my game when toddlers patched in, a lot actually. It got to be so bad that I can't stand to give any of my sims the trait that causes them to want to be comedians, nor do I give my sim kids the trait that makes them rambunctious, as it was causing all the sims in the family to be in a playful mood every time the one with that trait was in conversation. My toddlers, there is a trait that I will not use (I forget which one) causes my sims family members to become in a hysterical/very playful mood when they interact with that toddler for even just five sim minutes.
Can't really put a time on it, but I can say I do notice this abundance of playful/hysterical behavior. I do not like like it at all. It's cute for children and toddlers if it would just stay with them. It's not at all funny for me to see my adult sims in this behavior. Even with the comedians, use it when you need it, lose it when don't. Geeze Louise Already!!!
