You decide to engulf the boy more. Slowly stretching your rubbery balloon body downward you feel yourself stretching over his waist and pressing close to his skin to get under his clothing. You move past his belt and his shorts, and then find yourself encountering the edge of his underwear.
You decide it would be more fun if he was totally nude so you press closer to his skin and work your way down. The boy realizes whats happening and he gasps trying to move his fingers in between you and his own skin, but you are too tight and strong and he fails.
Pressing to him you move downward over his skin and coat his genitals mashing them painfully against the boys crotch, then with a jerk you pull his legs together and continue downward. You expand a little and his belt and shorts fly apart, ripping and popping. His underwear stretches but soon it too is torn in half and fabric falls to the floor as your journey down the now naked boys legs continues.
Soon you are at his feet and you do carefully engulf them, leaving his socks and shoes outside.
With a twist you tie yourself under his feet and seal him in. Like a giant hamster ball you are now a large balloon sphere-oid with a naked handsome boy inside you. You laugh to yourself as you watch him pound on your walls and yell for help. He makes pleasurable squeaks as his hands try to pull you open, rip you, or scratch you, but you are more than he can handle.
Then...