This was Rodney's bad decision, in a very sympathetic and in-character way.

Yes, it was. However, I don't let that absolve John of being a jerk, which was John's decision. John was invested in getting laid, but the way he went about it was hardly something I'd have put up with, and I don't cheer about him treating Rodney like a somewhat whiny knothole in a plank.

People don't fall madly in love because you have sex with them, but they could fork over some courtesy in honor of getting what they so obviously want. Giving Rodney shit for not jumping right onto John's cock didn't make him anybody's dream fuck. :)