But sometimes they will get along, and you will catch them napping with each other in the bed that you left unmade out of laziness or a pathological fear of being an adult or because you are working from home dammit and you might need to crawl back in there, and you will feel like a real parent. Ok, maybe you wouldn't, but I feel like what I imagine a real parent feels when their kids get along. Like you have made a family. And yes, this family is made up of selfish fuzzballs who lick their own buttholes, but still, we are keeping those things alive, and I am impressed.
And sometimes my cats yawn, and cat yawns rule.