Jake is a year and a half old and I have only seen him lift his leg once. He has a sister, so I think he assumes squating is the way to "go". Jake has been around lots of boy dogs that "lift", but he has never picked up the behavior. I guess time will tell.

My family dog, Cody (also male), did not start lifting his leg until he saw other doogies doing it. I assume that this is a learned behavior, but that some boys are more likely to do it than others.