So it would seem the definition of sex needs to be done before truly answering the question.

Sex (the physical act), Sexuality (the mental stimulation), it's all "sex" in my opinion and no, for me I couldn't, and wouldn't want to, have BDSM activities without "sex".

It brings to mind the play party I witnessed in February - They were openingly flogging and spanking and such but they were not allowed to do anything that involved transfer of fluids (fucking, sucking, licking) - so to me it held absolute zero appeal because I would have Needed the complete act and as my release isn't as important to me as His, I would feel let down to miss that part of it for me.

Now I do understand that it would hold much sexual appeal for the exhibitionist or voyeurs in the crowd, neither of which I am.

So, bottom line? I think that BDSM is sexual regardless of how you cut it, it Stimulates our Base Sexual Instinct simply.

P.S.: Tom - yes, you are right hehe