On a tangent of what I've already been talking about, I'm remembering a lot, I'm thinking every single time I've been around any girl he's dated, he's always talking to someone else and the girls/women are more interested talking to me. I'm not trying to suggest anything here but it's a pattern, yesterday just gave me another example. This includes the mother of my niece and nephew.
The only exception is a girl in high school who trained at the same small karate dojo since we were kids that only had maybe 15 students at best back in '94 or '95., I didn't know they were dating. Never came up because like... we were too busy punching and kicking each other.