Men! How do I tell my boyfriend that he needs to lose a few pounds and stop eating junk food!?

I will always love him unless he turns into a schlubby, fat-ed, beer-bellied manatee. Honestly, he's so handsome, but he doesn't care about his health anymore. I want a handsome, well-muscled man, not someone who gets sad when his favorite team loses and eats all of my Doritoes.