Weight Gain

[Janna]

Definitely can gain weight that way.  I had a family that ended up with three having birthdays in the same week, so had one party and invited all that could be invited.  Set up a buffet table and none of the guests ate from it, but one of my sims, she couldn't seem to stay away from it.  I had some of the family members take the food to the fridge to save and instead of taking them to the fridge, she was going outside to eat.
Noticed later that she looked different, sent her inside and she was huge!  It was Bella Bachelor, so she wasn't the least bit overweight before the party.

Fortunately, I sent her to bed and for the next three days had her working out a lot.  Didn't let her eat until she was really hungry.

She lost all of the weight and returned to her normal size and stayed that way.  I had been worried that she would return to the overweight size after she lost it all, but she stayed nice and slim. 
Anyhow, they can gain weight very fast in one night, but can lose it and keep it off it seems.  Except for the male sim who become pregnant when I had SEA, he had the alien baby and never returned to the nice sexy body.  He remained quite chubby. 

[Deklitch]

In that Bunch challenge from earlier this year, I had 4 birthdays on the same day, as none of them would have actually aged up that day, I had to use 4 birthday cakes. So, the family got chubbier than normal.

[Pam]

In that Bunch challenge from earlier this year, I had 4 birthdays on the same day, as none of them would have actually aged up that day, I had to use 4 birthday cakes. So, the family got chubbier than normal.

I almost always delete the birthday cakes after the first one so this won't happen so much.  You can just drag it to the sell box in your Sim's inventory like you do with dirty places. 

[KRae]

I delete the have a slice action after the first piece and use the rest for left overs.

[Deklitch]

I normally stop the sims from eating all the cake when it happens, but they were the Bunches and I thought it would keep them busy

[Rockergrrl37203]

My Sims lose weight pretty easily but getting them to gain is difficult, I've found. A Sim in my current family is addicted to the Teppanyaki Grill - he autonomously cooks on it, even when he isn't hungry. Then he always eats a serving! And somehow, even though he does this several times a day, he hasn't gained any weight. Not a huge deal but only in Sims universe can you eat fried rice 4 or 5 times a day and not gain weight.