Couver got neutered last Monday (~9 days ago) and I have noticed a huge change in his marking and humping... he is slowly losing interest in humping more and more each day.
He is just as cuddly as before, if not more. He has also toned down his excitement when seeing other dogs (he used to get SOOO excited, and freak out when seeing other dogs). Today he sniffed a dog, and kept walking
I am definitely happy with my decision to neuter him! The dog park trips are a lot less embarassing trying to pull him off of other dogs