15 mins is pointless, its a bit like some desperation scenario.
After a great many years of punting, I would argue the 180 degree opposite is true and, furthermore, after a punting career that's included overnights, multiple hour bookings and the like as a rule of thumb, 15 minutes is my favoured punt nowadays.
15 minutes isn't pointless. Punting itself is pointless. Let's not beat about the bush pretend as you might, at the end of the day in punting you hand over money to shoot your bolt with a pretty girl. She may be a competent entertainer and there are ways in which you may get on quite well together but 99 times out of 100 -- or more -- she is not your friend and, unless you really want to kid yourself otherwise, she wouldn't be there if there wasn't cash involved.
Thus, 15 minutes for, say 40 quid exposes punting for what it is. Impersonal, functional, and relieving. The only true bit of a punt is fucking and coming because there's no make-believe in that bit; you feel good and you shoot your bolt. It's physical. So the 15 minute punt you go in, you have sex with a pretty girl, you dispense with the make believe, small talk and faux romance, and you leave with 60-80 quid still in your pocket which would otherwise have been spent on another 45 minutes of her pretending to find you good company or prolonged foreplay or whatever.
Now let me be clear I am not being judgmental. Some punters like prolonged foreplay and others like the faux relationship that comes with a really good escort. There have been times in my punting career when this has certainly been true of me. To each his own. But you're a wanker to describe a 15 minute punt as a desperation scenario. At the end of the day, Relief + 80 quid cash in pocket and 45 minutes to spend it is a far better deal than relief + 45 minutes of pointless self deception for 80 quid in my book.
Like I said, to each his own but the 15 minute punt has unarguable attractions.