Unless the guys you're all dating are washboard-stomached Adonises, don't you think they'd have a fucking nerve to judge your bodies?! And if they do, good riddance to the feckers.
Blokes have their own body hang-ups too, you know, often the size of their dicks, but being too scrawny, having a beer-belly, moobs, too little hair or too much hair in the wrong places, etc etc, worrying about whether their erection will keep up as they had that wine or aren't as fit as they used to be or they're nervous.
We're all just messy, floppy, wibbly human beings with hang-ups and hang-downs. If you fancy someone and they want to go to bed with you, just go for it, and concentrate on the pleasure of it and the fun of it. Sure, turn the lights off, do it by candle-light, put on a teddy if it makes you feel more comfortable, but take a risk. If you're dreading it, don't do it, the excitement of getting it on with your guy ought to be stronger than your body issues.