I don't write stroke. On the other hand, I have a story which is 2,181 words long. Of those, 1,968 go from when foreplay is already established until his orgasm is described.
That's 90% of the words.
How many stroke stories on the site have 90%, even 50%, of the words actually describing the sex act?
The point is that a couple can reveal sides of their personalities during a sex act as much as at any other time.
It's called _Turnabout is Fair Play_.