Divorced people, did you go back afterwards just to make sure?

This comes from another question about seeing someone separated but not yet completely divorced. About 6 months after we were divorced I ran into him at a party and he drove me home, leaving his date there. Well what happened, happened and we saw each other for a few weeks, then he moved back in. He was on his best behavior and it was like the honeymoon again.

For various reasons it didn’t last, but a lot of divorced friends have told me that rerun sex is pretty common. What do you think?