my GOODNESS! I was a bit amazed at some of the replies to this...come on guys, let's not be rude - we are all adults, loving pet owners, and should have a bit more maturity than that...let's be nice!
He could definitely have changed because he tried to "do the deed" with a girl, or it could be from something else. Has he gone through any other stressful thing lately? It could also be from his hormones changing if he was just recently neutered. Whatever it is...good luck
