The same thing goes with parenting. Even when your village is out of space for newborns, all the parents want to do is have sex in the funky shack. It's really lame, since mates tend to go for those who have alot of skill, which means that the non-parent mate gets distracted away from whatever job they were doing. Why can't those set as parents just teach the children?
There are ways around those problems. If you don't want too many children, then try to make only the women parents, and make a parent male only if you're ready for a population boom. Then the parent women won't distract the men from their job for too long.
If you just want to make master parents, then do so while they're old enough not to have babies, and find them an older male to mate with. Keep them together, and they'll continue to mate together without distracting anybody else.
Though, I do wish that adept parents would be more apt to teaching lessons to the children after they've been shown to do that...