This is an easy one for me to answer. When I started punting I think I was trying to recreate my youth, the thrill of the date, meeting the girl, chat, drink, first kiss, fondle, undo bra etc etc you get the picture.
The date was 3 hours. To be fair I was damn lucky, her mum had been a nurse, we talked a lot and she basically changed me from a misinformed idiot to the savvy (Ha ha) punter I am today.
Since then I have cut from three to two to one hour. I don't think I can go to 1/2 as I do like to explore and RO can take 20 minutes alone. I am no longer interested in the date idea, just bonk and go.