It may be a reference to a pattern I noticed when I was still dating. I noticed that it was usually (greater than 50%) the single moms that were the most daring, willing to explore, kinky, etc cetera, in the bedroom. It might have been because being a single parent (speaking as a formerly single father) doesn't afford a lot of spare time and on top of that, there are a lot of people not willing to date anyone with a child. So sometimes you are just very excited to have someone interested in you and are willing to go the distance even if it might not be the cat's meow.
Single moms are my bread and butter. They're super into it, they have no time for bullshit, they just wanna go. If you're going for the right single moms you won't ever even meet the kids.
Married moms are even better. Last three gals I’ve ‘dated’ have been married. As a single father with full custody I get the time to focus on my kids, never have to worry about the whole meeting the kids conversation, and an hour or two a few times a week, usually during work (I work from home), is the perfect amount of time to spend with someone especially when none of it needs to be about stupid shit, they got some loser cuc at home to bitch at.