The main question I have is simple,

I was with a plate over the weekend and my experience had me wondering, if the girl goes down on you and you both have fun for half an hour and she ends up climaxing but you're unable to, what goes on in her head? She kept apologizing and now texts me that she'll be better next time and make it up for me. I just thought it was funny because my first ever experience had me bursting 1-2 minutes in and now I just remain calm and I have a lot more fun.

That being said, I'm wondering if there's anything wrong with me. Obviously guys want to last longer, but since she was begging for it, I had to finish myself off since she couldn't and that had me wondering whether or not that's fucked up and I should do something about it. I still watch porn occasionally and I've heard the term "death grip" thrown around so I'm wondering if anyone has any insight. There was also a great pdf of quitting porn that was linked here sometime ago, but I'm having trouble finding it if anyone managed to bookmark/save it.

TL;DR
1) When you outlast your plate and she is unable to finish you off, what goes on in her head?
2) Is it bad if you have to finish yourself off instead of her?