Apotheosis/Dione/Backstory/Force him to show it
Well he'll be damned, because there's no way you're taking "no" for an answer. You didn't get to see Paco's penis up close. If Theo is not willing to show you either, you just have to take your opportunity yourself. You grab him by his waist, taking hold of his pants, and pull them down before he even properly understands what you're trying to do. His measly excuse of an belt immediately gives away, and you can now see his underpants in front of you. As soon as he realizes this, he's already looking to pull up his pants, asking: "What the hell are you doing!?" As he complains and tries to back away from you, he actually manages to somehow trip on his trousers and falls flat on his butt. You find this hilarious, and also a good opportunity.
With absolutely no sense of privacy, you force yourself between his legs, and you pull on his underpants next. Then, his penis is finally revealed in front of you. It looks soft and flabby, and while small, it actually manages to look somewhat big up close. Moreover, it's completely different in shape to what you have, tickling your curiosity further.
He pushes you away with one hand as hard as he can, almost as if trying to knock you over. "Get off me, you idiot!" Having gained some distance, he manages to hide his genitals from sight with his hands. He's quick to get to his feet, and he pulls his pants up. "Now you made me really angry, Dione."
Normally you get upset and scared when people get angry at you, but this time, you actually can't help but to giggle. You do decide to apologize either way, but it doesn't sound very sincere. "Sorry", is all you say to him as a reply.
"I-I hope you're really happy with yourself, because I'm not. Promise to never do anything like that again, or I'm telling on you."
Well, that's not something you were really thinking about. You don't even have to be told that what you did was a bad thing. "Okay… I'm really sorry…" you say, this time with genuine regret. "I won't do that again…"
"Good", he says. "Get up. Let's get inside before they get angry at us."