I have a beautiful older sister, but she is very caring and treats me like a kid even though I'm now a high school student. She suddenly came in while I was taking a bath and as soon as she saw my foreskin, she said, "You have to wash it properly! You won't be popular with girls!" and tried to pull back the foreskin and wash it gently and thoroughly! Then, when I got an erection, she said, "Hey... let's do something more adult," and made a super erotic face that I've never seen before!