Yo buddy, I'm sorry it has to be through here, but I tried to call you but you didn't answer my calls or my messages neither. I found the information you asked for.
It's called Naughty Finger Syndrome (when your finger just sticks up your ass by itself). It is super common in homosexuals your age and is not dangerous. It happens when you see another man who turns you on, it can also be a sign of rectal hyperappendicitis. Maybe go to the doctor. Don't watch gay porn and wash your hands every time you touch yourself so you don't get conjunctivitis like last week. If you keep it dilated, your anus will also hurt less when you put your finger in. Greetings and I hope this helps you :D

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+rep (>^_^)>

ur in anomalys stream rn bro