Is having sex with a robot (that has AI) considered cheating? Yes, you are having sex with something you couldn't distinguish from a human unless you specifically knew otherwise. Is watching porn cheating? No. Is watching VR porn cheating? No. Is masturbating with a fleshlight cheating? How about a robot without AI? No. Is getting a lapdance from a sex worker cheating? What about if you masturbate to the sex worker while she is in front of you? No. Strictly speaking I think cheating involves some form of sex, but that doesn't mean your partner can't be legitimately mad at you for doing these things, like getting a lap dance or masturbating to the sex worker.