So true, there are so many variables, and as stated before there are psychological factors at play also.
There can never be a guarantee no matter how good we are at it.
It stands to reason if they came with each guy, they would be exhausted in no time that's why a lot of them fake it.
Imagine us guys having to constantly orgasm for upto 10hrs in a day, we would want to go to sleep after a couple of hours.
Littlewonder- Don't be harsh on yourself - I've been there too- There's always the next punt.......