I caught my best friend, someone I've been friends with since we were like 2, fingering herself to a picture of me in a bikini. I thought I'd be angry if something like this ever happened, but I'm really not sure how I feel. I know I'm.. considered moderately attractive at least, and as creepy as it felt I figured somebody out there probably got off thinking about me, but I really didn't expect it to be another girl let alone my best friend.

I figured if I ever actually caught someone doing it I'd want to murder them or something. Now that this has happened I just... Well, I've been thinking a lot. I started thinking, if she was masturbating to me she was probably thinking about having sex with me. I started thinking about what that would even be like, and at first it was really hard to imagine because I've known her platonically for so long. Then I thought, well what if she pinned me against the wall and kissed me, or something??

After forcing that scenario in my head I realized that in that scenario it actually wouldn't (at least not any more) be an awkward thing in my mind. Now that I know, or think I know what she wants it actually doesn't seem "gross" any more. My mind quickly went from kissing to more, and it felt REALLY DIRTY thinking about it, but not disgusting like I thought it would. I brought up a picture of her on my computer, one from the same day as the picture she had of me (we were at the pool) and a dildo, and I masturbated purely to the thought of her fucking me with a strap on. I came, and quickly closed the picture down because I was so embarrassed.

I know I've been with men before, and I know I enjoy having sex with them, so I'm considering myself bisexual until I know for sure whether I can enjoy women as well. I haven't really spoken to her since I caught her masturbating. Since I have no idea what I'm doing, I'd like to ask; how should I handle this?? Should I just walk up to her tomorrow and say "Hey I'd like to see where this goes, if that's alright"?? I know we're both single but would it be appropriate to try for a relationship right now??