Most Helpful Guy
I have kids myself and once dated a single mother (before I had kids). The kid (s) come first, which can be hard for a childless partner to deal with; for example, when a date is cancelled because a kid is sick or hurt. There are more permutations of people that need to get along with each other, and sometimes in a situation where there is no biological father or mother in the picture.
Then again, maybe it's rewarding to a person who couldn't/can't have kids.