I prefer an hour, enough time for shower before and after and getting comfortable without rushing, and not worrying about not having enough time. If there is time for two rounds, its grand but most of the time I'm only good for one run when it's that short time, and I do like to take the time and cuddle. It's not all about the wham-bam-thankyou-maam, but the company as well, just the physical contact and talk is a big drive for me. But to be fair, I'm going very rarely.