Why do you want to breed? There are plenty of dogs out there needing homes without bringing more "mutts" into the world. If you just want to see a litter being born and have pups in the house, try being a foster home and fostering pregnant/mommy dogs from a rescue organization and PLEASE get that dog fixed!
It's no cool to just make dogs breed just cause you want them to. You should respect their rights and their life. You have no shame nor do you really respect your dog. How would you like it if you were forced to breed to a dog and not even been given the right to choose which one you see? Think about it. Dogs are smarter than you give them credit for. I have another dog besides my rat terrier and she would not mate with a dog of her breed. Think about it. Some dogs know what they're doing.