If it produces a child, (only one time is necessary), it will be far from “meaningless”. I will mean 18 years minimum of bills, loss of free time, hassles galore, and other obligations.
My sister’s cousin-in-law had a fling with a younger gal, when he was in his early 50s. When most of us were celebrating our children reaching the age of majority and the new freedom to do things without having to take responsibility for the kids, he was dealing with a middle schooler. And all the hassles of being divorced without ever getting divorced.