No, not a grad student, just a regular guy in my 40's looking back on life.

It's a fair point about whether I understood what she was offering. I'm as conditioned as everyone else so while it was obvious what the older girl was offering the logic function kicks in and reasons that I must be misunderstanding what she's offering. It was clear she wanted sex but it was safer to reason that I must be misundertanding.

I also agree that the younger girl just wanted my bed although I found it unusual that someone even at that age would strip naked, jump in my bed and be grinning at me playfully as I walked in. But it could have been innocent, I didn't find out I just did what I considered to be the safe thing.

I wish for a better society but I feel I have to be constrained by law and social norms even if I don't agree with them.