Sexual fantasies involving guys

I am 18 year old male. I haven't had any sort of sexual experiences in my life so far--I have remained abstinent because something I value about myself is that I want to wait for the right person before I have sex. Anyway, I really enjoy being around girls and have had crushes on girls in the past and even to this day. I've never really initiated anything with them, though, because I've felt like they were just close friends and didn't want to spoil that relationship. I appreciate friendship more than possibly ruining that relationship just because I want to "experiment."

However, since I started masturbating a few years ago, I have been having fantasies about having sexual encounters with other guys--mainly ones I find attractive. And it doesn't freak me out that I find some guys attractive because I feel like no matter what your sexuality is, I figure there come times when you notice someone of the same sex as being good-looking. I'm okay with that. However, I feel pretty intrigued sexually when one of my guy-friends asks me to scratch his back or rub his neck or just when I fantasize. However, I never imagine having sexual intercourse or being in a relationship with my guy-friends (the thought of either of those things tend to gross me out, actually). It's just I am aroused when I think of masturbating together or giving each other hand jobs or blow jobs.

Basically, when I think of SEX or RELATIONSHIPS, I think of girls. But when I think of being sexual in ways that aren't sex and just for fun, I think of this one guy-friend of mine or other guys I find attractive. In my mind, sexuality is really gray, and I'm not saying I'm straight or gay or bisexual, but I just want to know if what I'm sexually intrigued by is normal?

Do I just want to experiment? Should I initiate anything with my guy-friend?