I disagree, I know parents and non single people who have this mindset. It's who you are regardless of your marital status. It's really weird when parents are this way because it usually affects their parenting skills.I've noticed that some people who stay single and childless for years beyond the "norm" never leave that 20-something mindset. In regard to a lot of things. Well, even people in mid-age who find themselves single. I honestly think that the act of dating just brings that out in some people.