*sigh*
what in the world does sexuality have to do with raising children. wanting to be kinky doesn't affect your ability to love another person and provide a safe and healthy environment. kinky people only get kinky with their lovers, not with everyone else. who are you to judge this? it's not different with gay people. it simply doesn't matter.
the only time when sex should play a role in the decision of acceptable parent is instances of promiscuity. that does not contribute to a healthy, safe environment.