A female classmate who knew I was a virgin and had a masturbator came to my house and said, "Show me how you use it!" I said jokingly, "But I can't use it unless I'm erect, so you'll be my wank material..." and she was embarrassed, but she miraculously agreed to be my wank material! I got carried away and even touched her, thinking that I'd be my wank material... Then the girl got aroused, and the atmosphere became erotic! From the masturbator demonstration, I never expected to be able to insert it into a real hole!