I'm not particularly fond of locking people in cages, but if someone wants to do that because it gets them off, and someone consents to it, then I don't care either way. I have no opinion about it because I know that human sexuality is complicated. Judging someone for something sexual you happen to view poorly that's legal between consenting adults is wrong. That's exactly what conservatives do with gay people. If someone want's to lock me in a cage because it gets them off, and I agree to do it because I want to get them off, why do you think that's wrong?