Why do men always check up on ex’s or failed romantic interest

Ex’s always wanna stay friends guys you use to talk to always wanna watch your social media and why do guys you use to date send messages to check in or see how you’re doing every few months.. I’ve never understood the point of keeping those connections especially if it didn’t end on the best of terms I’ve always felt it best to just drop a person entirely and not worry about they’re doing and just move on 🤷🏼‍♀️ am I just a bitch lol

Maybe women do this too but I don’t have experience dating women which is why I said men.. but for the women who do it maybe y’all can tell me what the point of it is