Is it cheating on your girlfriend to make out with lesbians?

Was talking to a friend of mine who is angry at his girlfriend because she got angry at him because he made out with a lesbian couple at a party.

He says it's not cheating because they were lesbians. She says it still is. Do you agree with him or his girlfriend?



And the inverse, would you feel like your girlfriend was cheating if she made out with a gay couple?

What does CE Think?