25M - My hairline is going back on one side

[janimani]

Hello,
I have two photos here, one from 2019 and one from today
You can see the recession clearly on one side but on the other it has stayed the same (almost). What is the reason for this. And does sleeping on one side cause any hairline or any sexual activity? Or unhealthy eating etc
My dad is bald but everyone else is not[ATTACH=CONFIG]72294[/ATTACH][ATTACH=CONFIG]72295[/ATTACH]

pan drama

[UnevenHairline]

Hello,
I have two photos here, one from 2019 and one from today
You can see the recession clearly on one side but on the other it has stayed the same (almost). What is the reason for this. And does sleeping on one side cause any hairline or any sexual activity? Or unhealthy eating etc
My dad is bald but everyone else is not