Ephebophilia is when an older adult is sexually attracted to post-pubescent teenagers or adolescents—usually those in the age range 15–19. Adults with this attraction are called ephebophiles.

So if a 30 year old man or a 30 year woman masterbates to an 18 year old pornstar everyday. They’re by definition an ephebophile.

And it’s not morally wrong a 30 year old man or 30 year old woman to have sex with an 18 year old as long as the 18 year old is consenting to it.