In no particular order, some insider info:
When kicked in the balls (the most common phrasing with which I'm familiar), it feels like being kicked in an organ in the abdomen. To fake: vaguely grab nether region, widen your eyes, and gently drop into a crouch for a second. Then, after a few seconds, shrug it off and say, "Dude, that could've been bad. WTF?!" Go on with your day.
How big are you? "I dunno. About average, I guess."
Circumcised? "Nope. Never came up."
Prostate exam? "Doc said he'd let me know when it's time, and I'm not in a big rush."
Ever been caught in a zipper? "Yeah. That sucked!" (felt like the pinch from hell if anybody inquires further)
You could also be asked about hemorrhoids and things like that. But if it gets too esoteric, it's not unmanly to not wanna talk about this stuff much. Male conditioning includes a lot of stoicism and not wanting to think/talk about stuff that's too weird.
What was your first fight like?
How old were you the first time you kicked your brother's a**? That's something guys tend to remember, including something memorable about how it went down.
Also, ever keyed a car? Committed vandalism? Flaming bag of poo on somebody's doorstep? Rolled a yard in toilet paper? Used your dad or brother's ID to buy beer as a teen?
What is some memorable men's room wall stuff you've read? Growing up male means you've seen a lot, and some of it has been EPIC.
Boxers? Briefs? Tidy whities? Don't admit to anything girly or strange unless you have a good story behind it.
Oh, and when/how did you discover masturbation?
