I love telling people who are surprised my husband and I have been together so long that it is partly because we are childfree.
We've been together since we were 20/21 and married 13 years. "Wow! That's so rare! What's your secret?"
The people with children have so far agreed it's helpful.
Total 180 from when we were engaged and first married and people's minds exploded when I said I didn't want children.
Just bragging!