My dog is a 2 year old bull mastiff and he has a thing for women and humping them he don't do it to me as I've stopped this behaviour however when female guests come round he pounces on them and as he's such a huge 10st dog it's a massive problem. I will not get him castrated yet because he's a kc reg dog and I want to stud him out. Is there any way of controlling his urges and do you think the first time he mates with another dog he might lose interest in female humans?
Thanks zoe.

