Yes

"The truth is exactly that." "No way!" said Jeff. "You're a guy. You have to be. You look like a guy and you sound like a guy." "It's the truth, Jeff. It's easy to prove." "So prove it." "I have to pull down my shorts to prove it. Would you if you had a vagina?" "It's so unlikely that if I really wanted to convince someone, I'd have to!" "Fine," said Jon and pulled down his shorts, revealing a complete female crotch instead of his dick and balls. "Are you satisfied?" "Wow," said Jeff. "I guess you were right. So Jon, do you ever...."