Yeah dude, you're not going to fit in around here. We are all well aware of how dogs come to be. What you fail to realize is how many of them end up dying because of people like you. Educate yourself a little more before you try to argue with-sex is natural. Lamest argument ever!
Just for giggles, how about you call your local shelter and ask them how many dogs were put to sleep last year. What were your plans for all your puppies? "Got homes lined up?"-right, guess how many times we've heard that one...again when you're on that phone call to your shelter ask them how many of the dogs they get are owner surrenders. Going to advertise on craigslist?-because that's SO responsible. Hope you don't run into the craigslist killer or give your dog(s) to someone who uses them for fighting, abuses them, leaves them out in the yard unattended all their lives, or...you know, drops them off at the shelter after 2 years of having them.
I don't even think you have two of the same kind of dogs. One is blue-so it's likely an Ambully...and the other looks like it's either an AmStaff or a APBT (if they're even completely legit dogs). So you're doing no one a favor by trying to breed them. You clearly have no idea what's going on. Hope you don't have teenage (human) girls in your house that end up pregnant...cause you know, sex is natural and all.