OK, so all the research which came out the other week said that people are definitely born with their sexuality and its a physical difference in brain (BBC NEWS | Health | Scans see 'gay brain differences') I don't think people here will be too surprised about that one.. So lets move the discussion along.. if you're a gay guy, do you think you are born a "bottom" or "top" (or versatile) or did you have some experience which decided it for you? Has anyone switched between being top or bottom during different stages of their life? If so, why? Or do you think if you're a bottom you're simply born to be "more submissive"?