I'm 5'7 about 130-140 and if I gain weight I don't feel sexy. My 2 bf's find me sexy no matter how big I get. Last year I fucked up my knee really bad while riding my horse, I mean falling off my horse. I needed to have surgery and lots of rest, I ended up gaining 20lbs! I felt frumpy & not very sexy. My boyfriends were very supportive and when my knee was strong enough I started to exercise again & I have since lost those 20lbs.
I think it depends on how you feel about your body, If you're not feeling sexy, do something about it. If you do feel sexy, then baby..show your cupcakes off
You could also bang a couple that is around the same size is you or bigger.