I am asexual. That means different things for different people, but for me it means that I don't want to fuck you and I don't want you to fuck me. No, nothing bad happened to me to make me this way. I've always been not interested.
This might help explain if you're confused: http://www.wikihow.com/Understand-Asexual-People
I am romantically attracted to men and I do get sexually aroused by situations and interactions such as making out, body contact, fetish play, roleplay, bondage, socks, shoes, etc. A typical experience with me may involve me and the other guy jerking off or him sucking me. Feel free to ask any questions; I'd rather you ask than assume.