Pegging? Yeah. It's big. Not just in porn, but in real life, as well. I know many guys who like it. Though, some only like a finger up the butt. You have to remember, the prostate is up there. And that's a nice button to push every once in a while. Some guys worry about it the first time. But then make it a normal part of sex. Or even a normal part of masturbation. It's not for everybody, though. And you definitely want to use lube. Especially for the first time...
AND DO NOT USE SHAMPOO AS LUBE. OR ANY KIND OF SOAP. LOTIONS OK FOR ONE MAYBE TWO FINGERS IF YOU'RE DESPERATE.