I wish I could have sex with a loli

And give her her first orgasm and take her virginity. I could teach her about the male body and I could learn about the female body. It would be the best thing ever. Then afterwards we would cuddle up and go to sleep.

say, if a grown man and a loli have a sexual relationship, and both enjoy it, and no one ever finds out, and the loli isnt mentally or physically traumatised at all, even in the future, is it still wrong?