I think you are having a desire for intimacy. I think for a 20 year old it is natural to want to explore that. I think porn is one way, as well as phantasying what it would be like to be with a celebrity. Hormones can be a big part of it. I don't know what is like for a woman, but I was 19 when I first had sex and for a year that was about all that went through my head. I chalk it up to growing up and testosterone from being active. My body pushing me to do what people do ya know?

Maybe the celebrity thing is due to not having anyone around you that you feel attracted to and connected with. I'm not saying run out and get sex, but have you thought about dating someone? Getting to know someone and falling in love may help with all these urges. Feeling connected to someone else and enjoying having someone in your life.

Personally, exploring sexuality was very pleasurable for me. Learning what feels good, and connecting with another person in that way. I can't really explain what it is like, but I found it very enjoyable. Not just the sex part, but also the connection part. I hope this helps.