Why is it?
Most Helpful Guy
Built in genetically, he probably doesn't realise or can't help it. We are designed mostly to find as many mates as possible, claim them as our own and get them pregnant, protect them from other males and then leave them when the kid is around three months.. just genetically speaking, obviously social/cultural influences change it but thats the basic underlying idea behind most males
Most Helpful Girl
Not all guys; he's territorial.