Ash85, I would be uncomfortable with how he associates sexual excitement with your fighting. How deep does this excitement go? I might be overreacting, but do you suspect he ever picks fights *because* of the sexual excitement he gets from it?
I don't know if this is normal, but I'm alarmed that his sexual desire is more important when you two are arguing than YOUR feelings (or resolving the issue, for that matter). I would say no (never heard of it or experienced it before). Be cautious and make sure you're not heading into an unhealthy relationship with this person.
if i was you i would be happier to have a masturbater then a cheater!!!!!!!!!!!
good luck