Sometimes,
What I think is that you should do your best not to overthink things. My personal opinion is that there is no need to label yourself as straight, gay, bi, or whatever. The label has nothing to do with the core you. In my ideal world, people would keep themselves open to being attracted to PEOPLE, not to guys or to girls. Just to people, and see where it goes.

But I don't think how you dress or how penetrative the sex is really has anything to do with your sexuality. That's just my opinion. For me, it's about who I relate to and who I want to be close with. The person, not the gender.