Well damn! That was really intense!
As inexperienced as someone can be, desire to pleasure the partner(specially if you love them) and, lets say instict, can help anyone to have confidence to do just as Momo did.
Now, the men thing, well, I guess straight/bi/etc women are more trust worthy to talk about that, so I cannot really say much since I'm not into men, but of course there are men who enjoy bringing pleasure to their partner and cares enough they are experiencing it.
I think what Momo meant to say is the feeling of euphoria one gets when they are pleasuring someone, and how much enjoyable it is to be the one who caused all those feelings.
Their intimacy might actually bridge them out of the confinements of the hotel bedroom. Against all odds, apparently.
Hm... I wonder... Still too early to make more assumptions. For now, it is enough. Great chapter.