C'mon, admit it... you're just into animal sex, aren't you.
Seriously, what you have described is the best case scenario, but people being people will stray from that. There will always be people that will claim to believe exactly what you've described, but in reality cut a corner here or there. And a few that will cut enough corners to create a circle. Those people will bring down the heat on the rest, and of course the governments answer is alway draconian on everyone.