Read here (for the full article):

Here is an excerpt:

"Level 2 male Rapo is happening when the man makes plausible commitment and territorial gestures, and thoroughly convinces his target that he does consider her his partner, but without actually saying he loves her or wants a committed relationship. Part of the commitment behaviors may include intense sex in which he encourages her to try new, kinky, or perhaps uncomfortable, potentially humiliating things one would generally only do with a very trusted partner. There may not be sex happening though. He could be encouraging her to share secrets with him, or using her some other way. It ends when the sucker seeks confirmation that he does indeed want a commitment. He doesn’t, and ices the cake of humiliation with, “I never said I loved you/wanted a commitment.”

Explains them pretty well.