On a deeply, hormonal and emotional level do you get wet when you see a naked woman? Or does it make a difference if the woman is naked or not when she is bound? Do you care whether the woman is pretty or not or even who the woman is?

These are questions you need to be thinking about if you want to answer your question. As stated, labels do not matter and largely BDSM transcends both sex and gender preference. However, if you get definite sexual feelings from seeing a naked woman (unbound) then the chances are you have some homosexual tendencies which you may want to explore. If you also get similar feelings from naked men then you are bisexual.

Either way, I wouldn't worry about it too much. Sexuality is something intrinsic to your nature (it may even be genetic but I am not sure there has been much research on it other than an observation that some animals have similar tendencies and my theory is that it is at least partly hormonal in nature and therefore partly genetic) and despite what some homophobes may say it is not 'just a phase' or 'something that can be cured'. Best you can do is enjoy life any way you can and if that includes tying up women and watching them struggle then thats fine. In fact, if you like you can tie them up and watch while I taste them so then everyone is happy. I'll even do it naked if it will satisfy your bi tendencies