Why does my mums ex husband want to get

Back with her ?

My mum pissed me off today talking about her ex- I find it a major peeve that she still clings onto the fact her 5 year marriage is over when The guy she dated was a bald shit head Who was into heavy porn and a sex freak. Also, he used to tell her he thinks hes gay. So she hasn't dated since him but has 2 guys interested in her and she's like na cause she said her ex is still in her mind or something. I'm like he's a cunt tho. Also, her ex is a freak!! They're now divorced And he still tries to sometimes contact her And ask if shes dating anyone and says he still loves her LOL !! Why does he care if he thinks hes gay?
He used to tell my mum he thinks hes bi or gay, and she knew he watched sheman and gay porn 🤮