Sure, and there's a handful of people out there who are fat because of legit medical reasons. Doesn't change the fact that in a lifetime you'll probably never run into a single one of them. I hate slut shaming as much as anyone. But I'm sorry, a physical barrier is totally effective if you're using it right and if you're not buying them at the dollar store.  I've got about as much sympathy there as I do for people who don't grasp that fries have calories.