Talk To Yourself

Is it me or in yaois and shounen-ai the characters and the couples are never cuddly? Like, sometimes a hug is the best move they could make, but no, they never do it.
And if one of them starts a hug, because I don't know, he is sad, or maybe happy for something, the other always goes "noo get off, what are you doing, BaKA!1!", or he just stays still, without returning the hug, or at least giving a caress. Like, why? why, won't they show physical affection? And I'm also talking of when they're already in a relationship, so when they should be comfortable doing this stuff. What do you guys think?

Btw I know that not ALL yaoi/shounen-ai are like this, like I found some cuddly mangas, but they're like only 2 out of 80 mangas I've read..

Of course, if you have found something like this feel free to write it, I'd really appreciate some recommendations (๑•ㅂ•)و✧

Also, I'm very sorry for the bad English ╥﹏╥