Guys: if female friend asked “how big is your penis?” how would u respond?

The correct answer is that you don't know and volunteer to let her measure it herself.

I'd think it's sexist for her to think it's ok to ask a guy that question when she'd probably get offended if I asked her how big her tits are. I probably wouldn't have the courage to actually tell her that though, I'd just tell her I'd rather not say.

I'd ask her how big hers is.

"Come find out" *wink*

I only have a blackhole for a crotch.

the guys at work say they have small penises. They say it makes the girl expect it to be smaller than it is and less "disappointing," I think it also makes the girl more curious

Small, leave me alone *kickflip*

I would get myself hard and let her see for herself.

I'd say, "Get away from me, you creep," because I have no female friends.

not terribly big, but will get the job done.

Probably say that it's big enough.

If I've had a few and I'm feeling funny... I'll say that she can check it out and find out the exact size.

Once a friend and her friend asked, I just showed them.

I'd probably say that kind of question is very inappropriate.

"it's big enough to satisfy"

I answered "Other."
I'd just show her, if any lady knows you well enough to ask she probably wants to have a look and a feel.

I'd say I had a micro dick

I would say that I have never had a problem hitting the bottom over and over again.

Depends on the context. If its a completely out of the blue question from a female friend, I'd just give you a joke response, unless you give me a legitimate reason for the question.

If we've got a thing going on, serious flirting back and forth for a while... I'll respond honestly -- though I don't actually know the exact size. But that just so happens to open the door for a flirty "why not come see for yourself" sort of response.

I'd just awkwardly laugh, most likely My self-esteem is too low to answer questions like that.

I'd tell her it's none of her business.

I’d tell her I have a cock with one of those adjustable knobs (like on lightbulbs). Little me goes from 1” to 6’ of thick salami cock in one turn.

I'd say: it's none of your business.

Bruh thats nuts. I dont like girls unless theyre whores! If they're good girls they seem boring to me.

If she was a really good friend, and somewhat attractive, I'd say "You look at it and tell me!".

IF I felt inclined to answer (only certain ladies have a right to an answer); it'd be: Big enough to get the job done; and its what a person can do with what they have that counts... :)

"Above average."

That's honest and vague enough to avoid sounding like bragging.

Of course, if she had any understanding of basic statistics, she'd know it's not saying a whole lot since 50% of men could truthfully give the same answer.

Your curiosity is understandable, but hopefully you understand if a woman moves a conversation with a guy beyond the bounds of polite chat and asks him a direct question about his genitals, most guys will take it as a signal that she's interested in having sex with him.

I'd say something snarky like "I dunno, I don't have enough spare time in my day to get my ruler out and measure it"