Is it normal to be turned on by bitten forearms?

So I've been feeling this thing for a while and finally got the idea to ask you guys.....OK so me and my girlfriend play fight sometimes, a little wrestling, some flirty horseplay, nothing too crazy...but one time she bit my forearm and latched on ( not like a bite of death, more like a light " I'm gonna bite you cuz we're playing") and this turned me on, it send feelings all over my body from the one bite, sometimes I tell her randomly to bite me on the outer forearm just to feel it and it feels so good...so what Yall think? IIN?