To explain question number 1:
Question 2: No. l'd wager it's about even, and possibly the other way around, where a few more men prefer it than women. l have no stats on that so don't quote me. However, given the various pre-existing psychological issues many women could typically have with bondage and forced submission, it might be harder for many of them to enjoy it on a sexual level, whereas you'll find a good number of men who have never had the experience of being submissive (and therefore, no pre-existing positive or negative views of it), try it, and discover they love it.
Question 3 and 4: No! l doubt it's a cultural thing at all versus an individual thing. l can think of no culture of women off the top of my head that is collectively into bondage. Overtly sexual in a culture that includes bondage, yes, but bondage as a widespread practice, no.
Question 5: As Allena points out, many reasons. For me -and l'm very specific about the type of bondage l like, why, and under what circumstances- it's not about giving up control. lt's purely, inherently selfish - it's about someone doing all the work, which includes giving me pleasure. lt's dominating from a submissive position, if you will, and the challenge of maintaining control in a situation where one would assume l have none. (This is not typical of a number of bondage scenarios and perspectives, where a specific dom/sub dynamic may be involved, but l'm a switch, and apply that to any sexual situation l engage in.) Sure, you can do what you want as long as we agree on the terms beforehand, but there are certain things l require as well while in that position. lt's what feels to me like a good blend of two satisfied desires and boundaries, while neglecting neither. That differs from other dynamics, however, but that should be obvious.