You don't really know how women works, hm? Emily already told Melissa about that really handsome guy who made her wet and asked her out to a date. Melissa will help Emily prepare for the date. They'll go clothes shopping together, Melissa will do Emily's hair, and Melissa won't stop giving advice. Of course, Melissa will look at the guy who then shows up at Emily's place and picks her up. If only from the fence. But more likely, she'll sit in the kitchen with Emily and wait for the doorbell to ring. That's what best friends who are singles do.
Oh, believe me, a woman never forgets the appearance of the man who put a roast in her oven. As a matter of fact, they never forget any of their sexual partners. At least if it's a normal number. It's different for those who come around a lot and for professionals. But even they never forget the partners where there was something significant behind it. If I understood Melissa correctly, John was more than just an ONS for her. She just didn't manage to make more of it. And let's not forget John's reaction when he saw Erynn for the first time. He obviously seemed to remember Erynn's mother.
Another woman. John isn't a monk.