I'm an old man. I have erection issues from time to time.
I never looked at the time it takes, it's different every time.
I only do BNG with 1 lady(see reviews).
There never was a time limit, she blows till I blow.
She's never in a hurry. She does do some small things to help with erection and to get my motor running so I blow faster.
It sometimes takes as short as 10-15 mins, but at first it took as long as 30.
Early on, there was some talk to get comfortable. Now it's just DFK, some titty play, few other things she knows I love during the bbbj.
She is the only chick I have found that can get me to blow for just a BNG.
Most other times I've tried, I had issues or couldn't cum.
She's magic.