I just asked my gf and she said it ranges from 8 to 10, so 9 is the average. 10 is for pornstars.
My gf always has an orgams, often several times, and says I'm absolutely the best, she says she actually realised how shit her sex life used to be. I trust her, she doesn't lie for me.
I can have sex for hours if I want to (though she usually doesn't want that). I can also play for hours before starting.
May change with age, I'm 24 now.
No troll is too much for me to handle. I rehabilitate trolls, I train people. I am the Troll Whisperer.