I have my own trained male k9 and quite often go out to couples where the Dom wants the sub bound, gagged and forced to take the dog. Of course i speak to both parties first to see they know whats involved. To clarify, i dont force my boy to have sex with women, he displayed his own willingness to mate with a human female with no prompting from me at a very early age and has had lots of fun time since. Our life style is just a little different to yours and we 'love' our animals just as you 'love' and cherish your subs.