"Ladies first." Said Ben as he pushed his pelvis upwards, making his huge erection point right at Gwen's face.

Gwen poked his manhood, it was rock hard and if it wasn't for the tiny garment it would have risen even higher. "Take it off." Said Gwen pointing at the overstretched underwear. "I can't." Said Ben. "My legs are too thick for it to go down." Said Ben "Well then change back to your normal form and take it off." Answered Gwen. "All right, but don't try anything." Said Ben poking the omnitrix in his shoulder. There was a flash of light and where once had stood an enormous muscled alien that had a 18 inch dick, now stood a scrawny ten year old in his black underwear.