"So how am I doing?" Marcus asked, stretching out his thick limbs as he rested on the stump.
Nicky's hands jerked away from the bucket and he turned to his bigger friend. "You're looking great! I reckon you must be older than 30 by now. I don't think I expected you to grow so bearish."
Marcus smirked and stroked his thickening beard with pride. "Good! Because I feel great. I feel strong and powerful, like I could rip a log in half. And all this growing up has me pretty horny..." He slipped a hand down to his crotch, rubbing the head of his penis with his thumb as it throbbed in his hand.
Nicky was in awe, he still couldn't believe his friend had such a thick dick. He knelt closer, desperate to reach out. He looked up, and Marcus gave a small nod. Grinning, he wrapped a hand around it. "Wow, it's so thick, I can barely grasp it..." he muttered in awe.
Marcus released a quiet moan at the feeling of another's man's hands on his cock. He felt a surge of arousal sweep through him. He looked down at his ginger-haired friend with lust as he handled his cock in his supple hand. He couldn't take it any longer. He suddenly moaned "Ngh... Suck me off!"
Nicky laughed incredulously. "What??"
Marcus wasn't joking. "You heard me. Put that pretty mouth of yours to good use and suck my dick!"
Nicky was surprised. Marcus was still under the shampoo's influence after all. White hairs were constantly breaking through the dense black of his beard, and his husky body was growing by the minute. He glanced over to the bucket and said "Maybe I should wash that stuff out first..."
Before he could get up and reach it, Marcus grabbed him by the shoulders and held him down to crotch level. "Ungh... It can't wait... Go on, do it!".
Nicky didn't resist, he wasn't exactly reluctant. Why if things were so urgent, a good friend would do their best to help, right? He grasped his friend's cock at the base, paused for a moment to lick his lips, then dove in. He started by sucking the head, his tongue darting around the red pecker, eliciting a moan from Marcus. He began to take more of it into his mouth, surprised at how thick it was. His jaw was aching at its girth, but still he persisted until he got its whole length into his mouth. He almost gagged as the head brushed against the back of his throat. Now confident he was able to engulf the thick member, Nicky slowly bobbed his head back and forth, sliding the cock in and out of his mouth, twirling his tongue around like he was sucking an ice pop.
While Nicky was focused on giving his blowjob, Marcus was focused on his changing body. He had only gotten hairier, not a single inch of skin was spared. It grew thick and dense across his chest, light and sparse on the sides of his torso, and unruly across his entire back. His hairline was rapidly receding, the suds were dissolving the very hairs as the bubbles popped around them. While his beard was growing wild and untamed, already long enough to hide his neck from view, he wiped a hand over his itchy head and cleared the entirety of his thinning hair off the top of his scalp in one swoop. He rubbed his smooth crown with an unnerving sense of glee. What would happen if he wiped all the shampoo away. Would he go entirely bald? Would the shampoo still be affecting him?
Marcus could feel the effects of the shampoo more acutely. He rubbed his furry stomach as his abs faded away and a small belly began to emerge. It continued to inflate outwards underneath his palms, getting softer and flabbier with each breath he took. He couldn't believe he was getting fat, and he couldn't believe he actually liked it. His round pecs were softening and losing their solid shape. Soon enough, they drooped downwards until they rested on his inflating belly, which jiggled like a water balloon as Nicky's head occasionally bumped into it. Marcus raised his hands up to his flabby chest and cupped each moob with a grin. He rubbed his thumbs over his nipples, tweaking the fat tips between his fingertips. He was high on his lust. He couldn't hold back much longer. He gripped his hands onto Nicky's head and started to roughly thrust his cock into his mouth.
Nicky was caught off-guard by the sudden change in tactic. He glanced up to see a globe of furry fat blocking his view of Marcus, it shook violently every time he thrust his hips. Nicky moaned himself, the roughness was turning him on. By the way Marcus' breathing increased, and the twitching in his cock, Nicky could feel him about to release. He tried to jerk his head back, but Marcus held on tight with his huge hands. With a howl of euphoria, thick, salty cum erupted from his cock and hit the back of Nicky's throat. He choked on the taste as Marcus spasmed, his guttural groans echoing around the creek. Each jolt released more and more cum until it was dripping out of Nicky's mouth.
Marcus stroked Nicky's head with a smirk and growled "That's it boy, you take your daddy's cock real good..." He rubbed his belly with satisfaction.
Nicky couldn't believe this huge, furry bear was really his best friend. He had to be twice his age by now, and still getting older. His beard was wild and dense, brushing across the top of his saggy man-tits and streaked with grey hairs. He had outgrown husky and verged into full-blown fat, with a hefty belly that rested on his lap. Much of the soapy suds atop his head had slipped away to reveal all of his hair had long since vanished from the top of his scalp, leaving only a horseshoe of salt and pepper hair around the sides. And despite all of that, Nicky still had a raging boner of his own from looking at his obese, masculine friend. He wanted to be treated roughly by this man, until he was sore all over. But he first, he had to get rid of that shampoo.