Guy noticed his package was pushing out in his Boxer-briefs. It felt like he was getting an erection, but he wasn't even hard?...
"Wha-" He stammered, but before he could even say anything, it started growing faster.
He grabbed hold of it with both both hands.
"This is insane...." he trailed off. Both excited and freaked out at the same time.
Meanwhile, his cock and balls were starting to get a little cramped in his undergarments. To an onlooker, it looked like he'd stuffed an eggplant and two large grapefruit into his crotch!...and they just kept growing!
His briefs actually began to sag from all the new weight, pulling them down enough to see the top half of his hairy groin. Experimentally, he started massaging his balls and lifting it. Guy moaned as he did so, closing his eyes, it felt so good! Incredible even! He could almost hear the cum sloshing around in his balls. He needed to get off in the worst way, but the growth hadn't stopped yet...
Opening his eyes, he looked down again...
"... Oh god..."