Having a more intimate variation would also be hilarious when you don't stop him from drinking you dry. Imagine having to talk to him in the morning after you let him kill you because you...were distracted.
That would indeed be hilarious (though I gotta admit unashamed that I do prefer to punch him for it)
That punch would be a perfectly valid way to express your extreme embarrassment.
For the bite scene I honestly wonder which part, if any, was supposed to indicate that our character is kinda into this. The first "let him continue", because then you lean into him?
That's how I always interpreted it and I think the narration reflects that with the "you lean into him losing yourself". And the first time I did that I of course rolled a critical failure on the following roll and died. So, I guess it indeed was a punch because of embarrassment after that.
