When you just cant stop spurting no matter how hard you try even no touching but you get so sensitive that when it rubs against tight boxers it just sends pleasure into your soul!
It'd be downright irresponsible to let your brother waltz off to senior prom without showing him what lovemaking is like first, wouldn't you agree? Now, if that innocent practicing so happens to ruin him for any other woman... Well, that's not big sis's fault, is it? β¨