into guy on guy stuff...

But now I've realized that I'm definitely into two guys getting it on... I feel so embarrassed since I feel like it's not normal for a girl to think about this stuff. I've even thought of my boyfriend with other guys and me doing stuff to him a guy would do and it sorta turns me on, but I never tell him and only make jokes about it, and I always stop those thoughts quickly since I feel so ashamed. 

I don't think I ever want to bring up this to him since it's so embarrassing to admit, but I just want to know if this normal for someone to think this way? I get if it's weird, but am I not supposed to think this way, or is it okay?