I understand that the age for starring in porn is 18. My question still stands....what makes you think this is not going to change. Many of the restrictions have been liberalized and continue to be. Give 'em an inch and they take a yard. What was "X" rated when I was a teenager is now R rated. That will soon be PG13. lol...actually a sad state of affairs.
I see no reason why it would change unless the legal age to engage in contractual relationships change. Even in regular hollywood movies, if an actress is under 18 and the movie calls for a nude scene or a breast shot the parents of the actress must provide consent.