When I was 32 I didn't think there was anything wrong with sleeping with a 16 year old.
That's horrendous, what would make you think it was okay to sleep with a 16 year old?
Because I didn't know how to prevent things from happening.
An adult sleeping with someone underage is wrong and illegal. You should look back and feel very wrong about your actions. If you have trouble controlling your actions now then you should seek professional help immediately.
I'm good. There was nothing wrong with it.
There absolutely was something wrong with it as it's illegal and immoral to for adults to sleep with youth who is underage. If this is a thing you still think is acceptable then you need to address your beliefs with a professional who can help you work through this and prevent you from repeating these actions.