If they've had kids, they are usually stretched out, and believe me, it's nothing to write home about. I'm happily married now, & we have no kids. But, if I were single, I wouldnâ??t mess around anymore with ones that have, had or want, kids. A nice, tight fit is best (not TOO tight, though).
You don't want to deal with their brats, either. If you're just looking for fun, you want someone with no responsibility or cares.