It is really up to whoever you are in a relationship with to define Cheating. Some chicks think if you have a sexual thought that doesnt revolve around them, it is cheating. I knew a guy whose wife wouldnt let him have a movie in the house if it had a titty in it. No Terminator, no Outlaw Josey Wales, no Animal House.
Other women, as long as you pay the bills, dont bring home an STD or a bastard, they glad you arent pestering them for sex, much less stuff they didnt want to do. Different guy I knew, his wife didnt care if he got head from randoms, as long as he didnt bang em.
My definition has always been that if bodily fluids werent exchanged, then it aint cheating. Lap dance, groping, grinding on a dance floor, all good.