My parents & family (sister, brother-in-law, neice, nephew)- "And that's part of what makes you special to us"
BTW - mums generally can tell, especially when they wash your clothes in your kit bag when on leave at the age of 19.
Mum "whos bra and undies" me "mine", mum "well I've washed & folded them for you", me "thanks".
Have your parents ever let you down? if not then let them know and find freedom.
If your parents are painful, anti-everything different, then I wouldn't advise telling them