I have a question for women and I am serious about this question and hope to get some straight answers.

Here is a run down of why I am asking this question. My girlfriend of 5yrs is somewhat of a tomboy as she is good in many sports and sometimes very demanding. Well about once a week sometimes more after we have sex she likes for me to lay on my stomach and she will lay on top of me and starts to rub her pussy on my lower back and not sure how but sometimes she has an orgasm from doing this. It's almost like she is pretending she is using a strap-on on me.

It has made me wonder if she is bi or hinting she wants to use a strap-on. So my question is this.

Should I ask her if that is what she wants to do and can women really have an orgasm from using a strap-on?

Thanks for any input.