You are having sex with the hottest witch at your school for wizards. She is bored and unimpressed by the size of your cock. She says you have the smallest dick in the whole school and she can barely feel it! She asks why you don't use dark magic to make it bigger, and taunts you for being too afraid to do so. She decides to do it herself. The witch uses her wand to cast a spell, causing your penis to more than double in size instantly! It's a great cock and one you can be proud of, but it's not enough for this sexy, evil witch. She casts the spell a second time, and this your cock is so huge you can't even stand up! The witch is shocked and awed by the results of her spell. She demonstrates how big it is by holding it next to her head and by struggling to get her lips around the tip. It's WAY too big to put inside her, so instead she straddles you and makes you lay there while she grinds her slick pussy against your shaft, getting herself off while frustrating you badly. After she cums, she tells you the bad news: a side effect of the spell is that you will never be able to have another orgasm. Your penis is now so freakishly large that you can't be seen in public. You are doomed to spend the rest of your life serving as a sex toy for the witch and her horny witch girlfriends, providing pleasure with your giant cock while never experiencing release yourself.