dog keeps peeing

[Keywest18]

I have a lab and he's two years old. We got him around seven-eight months. Ever since we've had hime he's always had an excitement problem (I call it chihuahua syndrome) he pees all the time. Everytime I go to let him out i grab his leash and go to hook it to him and he starts peeing...... I cant tell if he's excited or scared or what...the previous owners were abusive as I found out he's very scary of newspapers. But we've had him over a year and its really getting old. He's house broken he wines and lets us know he wants to go out but im getting really tired of it happening. If it was like once a week or so I can understand it as accidents happen but this is a couple times a week. We've also got his bladder checked and he was fine.anyone else had this problem. I really dont wanna get rid of him because of this and I refuse to have a dog thats strictly an outside dog.im also fixen to get another dog im gonna have to train and I dont want him smelling his pee and then peeing over it,if dogs even do that lol