There's nothing specific in the Bible about bdsm, certainly. It seems to me that a married couple doing a bit of tying one another up couldn't particularly be seen as 'un-Christian'. On the other hand, I guess a huge number of activities that are very common in our lifestyle - anal sex, watersports, general humiliation and degradation, third party involvement, viewing porn (if only for new ideas) - would be seen as wrong by the majority of Christians.

I was once a young evangelical Christian doing full-time volunteer church and evangelism work, while agonising over my frequent purchases of mail-order bondage magazines (which I could barely afford, if only we'd had the internet back then...)

Er.. I guess my points if I have any, are that I figure a circumscribed, low-key bdsm life - within marriage of course - must be compatible with Christianity. And that I'm glad I'm not a Christian any more.