Paul spluttered for words. "My cock's tiny, that's what's wrong!"
"Oh honey, this again? I've told you again and again, I like your cock. It's just the right size to do
things like this." She sucked all four inches of his cock into her mouth in one slurp. Paul was distracted
from his concern by the feeling of her tongue expertly tracing circles around his corona. He moaned.
Liz smiled around his dick and continued her ministrations. Paul knew he should be worrying about what was
going on to his genitals, but decided that while getting a blowjob, he should instead focus on... what was
going on to his genitals. And it was a good blowjob. There wasn't as much skin to stimulate, but what there
was Liz was using expertly. Pretty quickly he was getting close to orgasm.
He gasped in surprise as he felt Liz suck his marble-sized testicles into her mouth alongside his dick, then
moaned as she began giving them a tongue lashing too. "Oh god, yes." Liz could tell he was close, and
redoubled her efforts -- a feat Paul hadn't thought possible. He came.
Liz easily swallowed his load, and continued idly using her tongue to play with his softening cock for a
minute or two. Paul basked in the afterglow. It did feel good having his entire dick and balls in Liz's
mouth.
After a time, Liz reluctantly slipped Paul's junk out of her mouth, and crawled onto the bed on top of him.
"Mmm, thank you," he said.
"You deserved it," she replied. "Besides, I was thinking maybe you could repay me the favor." Paul sighed
internally. He hadn't missed cunnilingus. But it seemed for now that he should get used to it again.
"Sure," he said with a forced smile. Liz smiled back, then crawled further along him until she was straddling
his head and hiked up her skirt. She wasn't wearing any panties. Paul idly wondered if she hadn't worn any
all day, or if she'd slipped them off when he was distracted. She sat on his face.
Paul went to work diligently. As always, he went into automatic pilot pretty quickly, and his mind wandered
back to his dick. He mulled its changes for some time, considering particularly the circumstances of his two
changes, and trying to recall Priapus' exact wording. Pretty soon he had a good idea what was going on, or at
least a hypothesis to test. Anxious to sort it out, he stepped up his efforts on Liz's cunt, and reached his
hands up to massage her tits. Before long he got her off, and she got off him.
Paul stayed on his back as Liz slid to his side and draped herself over him. "Let's get these pesky clothes
off," he said as he began stripping her. She helped out by stripping him. Good, Paul wanted to see this next
step.
"Oh, I see you're ready for another round," she said upon seeing Paul's small erection. She began to move her
head down there, but Paul stopped her.
"No. Wouldn't you rather fuck?" Liz hesitated a moment. Apparently that was a tricky question when Paul's
penis was this small.
"Sure," she said with a reluctant smile. But Paul wasn't watching her face.
That was the magic word that set his experiment in motion. His eyes were glued to his dick. "Oh yes," he
said as it began to swell. It looked and felt rather like getting an erection, except that he'd already been
erect. Over the course of about ten seconds Smally Paulie outgrew that name, grew past the average Little
Paulie he'd known his whole life, and stopped at double its previous size, the same Big Paul he'd woken up
with that morning.
His hypothesis was right. It seemed simple in retrospect. His cock had first swelled just before he had sex
with Liz, shrunken for oral sex, and now grown back for fucking again. Paul had wished that his cock be Liz's
fantasy, and it was evident that she had different fantasies for different sex acts. It was a bit scary
having his junk be controlled by her sexual whims -- particularly since she seemed to remain unaware of the
changes -- but also reassuring to know that he'd always have exactly the cock she wanted for whatever she
wanted to do with him. That gave him an idea for future experiments, but they could come later. He could
come now.
He flipped her onto her back, lifted her legs onto his shoulders, and guided Big Paul back into his home
between her legs -- slowly, so as not to hurt her.