I don't usually enjoy sex reason i think is because i was circumcised. .. what can i be doing in order to be enjoying sex?

Doctor can check: One's doctor can check the penis to see if it looks like an average circumcised penis. If it looks ok, the circumcision itself should not cause an increase or decrease in desire for or enjoyment of sex... unless the person was circumcised recently or circumcised after puberty... because recent circumcision would have some new effects. That said, pleasure or lack of it, is largely in the brain.