Go from dating to boyfriend
If they broke up over it, then obviously this was not okay in their relationship. He clearly doesn't actually understand American culture, and might be excusing, or mimicking dangerous behavior without the intelligence to protect himself or the women he is using. be pretty sure they intend to "hook-up" which is one of the MANY terms used for casual sex.
So I'm still divided; do you think it's legitimate to get hung up on "titles"?
We have endless words to indicate various levels of physical contact with someone. Boyfriend/Girlfriend: this is a committed relationship where they have said "lets not see other people, lets just date each other".