I went on one a few weekends ago, after a round of tennis. Sadly, I nearly crippled myself when I fell off backwards and it came dangerously close to the groin.
I read this digitally when I pre-ordered, finally got around to re-reading the physical copy. Holy mother of fuck, this is a great book. More Homunculus!
For me it was showing how for some people who coast through school kind of flounder once they get past that phase. Some people think of high school as their golden years while I was just like "thank fuck that is over with".
I think he does it because he knows that is what the woman wants, so even if he wants to keep her to himself, he is making her happy... sexually that is :)