I think my criticism here is that it was over once both of you climaxed. But there are guys who shoot their load, and then are still quite willing to please their partner with their mouth or hands until they can go again.Nothing about the "realistic orgasm" mod is realistic. As a man you are like a Crossbow: you shoot once with full force then you need a moment to reload. The older you get the longer the reloading takes.
Cumming more than once is rare
But the addition of a second round if you want to mainly fixes this for me. What's missing is the ability to make your partner last longer/orgasm denial, and for NPC to ask for a second round on their own initiative.