Of course, when Jeremiah drunk from the Fountain of size, he had failed to take into account that the effects of the fountain's water had no effect on clothing.
It meant that the drinker from said Fountain of Size would grow or shrink, but their clothes wouldn't grow or shrink with them.
Apparently, Jeremiah's clothing was definitely getting too small for him now, due to his growth.
Jeremiah's jeans split even more, forming large holes and torn seams in the legs, and then, they completely split, and fell off his body.
And the same thing happened to His heart-patterned boxers.
Jeremiah was beside himself.
Then, it wasn't long till his shirt followed suit, splitting to shreds, and falling off his growing body.
"Holy shit!" Jeremiah exclaimed. "I'm naked, and I'm growin'!"
He covered his penis with his hands.