Hah, I was taking that angle for granted. The author almost seems to acknowledge that himself. I still found that last section of the article kind of interesting though.
Do you think the mechanism described at the end of the article is necessarily sexual though? It sounded like the thing the OP was talking about was more the exotic pressure of suddenly having something whisper in Bob's ear "Alice thinks your cute". If that is surprising information for Bob, and all Bob gets to do is send 1 or 2 texts to Alice, I can understand that Bob will get some kind of acute OCD with respect to those 1 or 2 texts. It seems rational, given their weight. Even more so if Bob is driven by his love drive and not his sex drive.