we neuter at 4-6 months when the testicles are fully descended. as soon as the little boys drop it's pretty much time to go. humping at this age is either to help his testicules descend and a healthy and good thing, OR it's dominace. he's prob. not sexually mature at 4 months but either dominating or trying to help his boys drop down. don't allow humping of humans as that's almost always dominane and not sexual. |