Do you guys ever play couples without kids? I'm curious

I like to mix up my family dynamics. I prefer rotational play which is much more fun if all the families aren't structured the same. I have single sims with and without pets, single parents, childless couples, oldies and roomies - whatever comes along. I do have a self imposed rule that if I roll a 13 when my sims woohoo it is considered an accidental pregnancy. I know there are mods for this but I'm happy doing it this way.