I have had penetration sex for over an hour more than once. I have only had sex with one woman without a condom, and I have had sex and not came before (with a condom on of course). It is all about endurance and what you are doing/concentrating on. I find it is difficult enough to cum with a condom on period. The last time I had sex, there was very little to no foreplay and it lasted over 50 minutes. She stayed wet and definitely seemed to be enjoying herself. She claimed to not really be into foreplay or oral sex, so there was very little foreplay. That was a first, as all of my other experiences were with women that enjoyed foreplay quite a bit. She got wet really freaking fast.
Foreplay can be more enjoyable than the sex itself for me because I never have received oral with a condom on lol. I am good with my fingers and my tongue, so it works out well.