I Honestly wouldn't know what to do if I experienced something like this. I would probably just feel sick, because something like this is sick. Not the whole "BDSM" part, but him engaging in something like this without telling you about it.. However you can't blame or try to put down someone for something they enjoy.. & Frankly, he'll probably never quite enjoying or acting in these activities.. It's what he likes and what he'll probably enjoy for the rest of his life.