My new boyfriend doesnt eat, I didnt notice the extent of his eating problems until I spent a whole weekend with him.

Basically he has one meal a day, and not even what you could call a proper meal, usually a sandwich, or a piece of toast. And he will eat the same one meal a day for months on end, for exmaple, recently it has been a cheese and onion sandwich.

He doesnt sleep, either, only 4 hours a night at most.

When I told him that his eating habits arent normal or healthy, he just shrugged and said he doesnt get hungry. He doesnt think he is thin, he thinks he is the right size for his height. But at 6'1" tall he weighs less than me (i am 5'8" tall and of average size/slim), his waist is just 28" which again is smaller than mine.

He also is hot all the time, which causes him to sweat alot, and he cannot get a full erection, his penis kind of gets semi hard, but not completely, I dont know if that is normal or not?

I am really worried about him, but dont want to upset him or hurt his pride by mentioning these things to him before getting some advice.

Does anyone know the symptoms of male eating disorders? The effects and how best to tackle it?