Ryan felt weird and he knew what's coming, so he ran to the bathroom before his father started getting suspicious. As he is running to the bathroom, his dad told him he's going to the gym and Ryan's mother is at the grocery store.
Ryan barely paid attention while he closed the bathroom's door. His body felt like it was filling with gas and he was swelling like a balloon. In a matter of seconds, lumps began to appear and disappear all over his body.
Each time a lump disappeared, Ryan's young skin was replaced by his father's rough and hairy one. Simultaneously, his muscles were getting bigger, his limbs lengthened and his hands and feet increased a few sizes.
Ryan was astounded watching each part of his body morphing until the lumps reached his butt and crotch. He moaned in pleasure while he felt his butt swelling alongside with his dick and balls. His father doesn't have a pornstar body, but it was better than Ryan's teenage one.
Something in particular caught Ryan's attention, his butt was sore. He explored his crack with his fingers and despite he found out new itchy hairiness in there, that wasn't what was making feel weird and uncomfortable.
He had never done it before, but he felt a sudden need to put his finger inside his anus. That's when he noticed that his asshole was way more bigger and flexible than before. He was red of embarrassment after realizing it.
He was straight, but even he knew what does that means. He felt completely disgusted at the idea of his father putting "things" inside his anus and he felt even worse after realizing that now he had that body.
"Does it means I'm gay now?" He wondered while he absentmindedly toyed with his newly regrown foreskin with a hand and scratched his new beard with the other one. "No, it can't be. I'm still me, so I'm still straight... right?"