Should you tell someone if their front trouser zip is undone? If so, how?

Yes tell them. Men and women need to be told of zipper failure. To avoid embarrassment the person should be told in a quiet way. A woman's blouse and buttons are off limits. Often women leave the top two or three buttons undone because it's fashionable to do so. Finding it offensive is your problem not hers. If you know the woman well you can make a comment but if she is unknown to you then it's none of your business. Zipper failure is quite different than undone buttons. A missing button deserves courtesy and attention, but undone buttons are fashionable and don't require conservative moral interference.

In Australia, we call the pants zipper a fly. Regardless of whom the male is with his fly down, we just say aloud while looking at there face and say, gee, the flies are bad around here. Once said, every male around checks their fly.

Yes, you should tell them. Don't make a big deal about it. Just do it quietly in their ear so as not to draw undue attention to this from others. This would also apply to women whose shirt button over their bosom.

Put yourself in their shoes or, as the case may be, their pants! Wouldn't you want someone to tell you that your cow's about to get out of the barn, (if you're a guy that is)? Or, if you're a woman, you'd be no less embarrassed than a man if it was you. TELL THEM IN SECRET OR GESTURE WITH YOUR EYES IF YOU HAVE TO.

You could try saying something like, "My, the (ahem) FLIES are showing themselves, aren't they?" - and if he doesn't get the hint, look down casually towards them and repeat, "The FLIES".

Or if you call it a zipper, do the same but look down in the first instance - 'zipper' has a much more common usage than 'flies', unless if course, the little midges are being especially annoying.

Yes, you should point, not tell, unless this person is a very persoanl friend. to point, down there, is just a general alert for men. it means one of two things. either his barn door is open, or.....you can guess the other. this is just another one of life's little embarrasments.

Great answer, yes, tell the person about the zipper. But how? Discreetly, for sure, but I think it depends how well you know the person. To a familiar co-worker I might say quietly, "check your zipper, my friend". But what about a stranger next to me when I am boarding a plane, for example? Any ideas?

"Kennywood's open."

PS-- or if he's well endowed-- let it hang for your viewing pleasure- LMAO- THEN you could tell him *wink*

Absolutely -- you just have to be tactful about it --- do so casually, lightly-- but mention, gently and in the friendliest manner (perhaps even a cute little BUT KIND joke)- its better to tell them so they dont avoid further problems -- a man could end up looking like a perv and get into some real trouble!As for women-- even more so-- do help them.

I think that you should tell a person that their zipper is undone. I try to add humor to the situation to help advoid embarrassment. For example I would say something like "You trolling today?" or "Trying to get more airflow?"

"The gopher is trying to come out to play."

No dont tell them, they may not be wearing underwear and there d*ck could pop out, now that would be real funny to see

You tell them XYZ, Examine Your Zipper...if they never heard that before, explain, and then they will also know. Probably, no one you say that if front of will know what it means-unless they have had their own zipper down before!

Gesture with your eyes. e.g looking at them and when they look at you, point ur eyes at their zips. Or if there are not much people around, you can stand against them and first point the finger at the them for a very short vwhile (Don't know how women would react to this) then act doing your zip as if it's undone. (In most cases it may seem offensive if you don't smile.)DO NOT POP YOUR EYES while doing so.

Anyone, stranger,friend or even your boss would want to know. Its a guy thing. You look him in the eye and say "Hey friend your zipper is down thought you would want to know". Its as easy as that, if they had something hanging from thier nose it would be a bit different

Yes tell them but by telling them in secret.

Hey dude! your fly´s open! Zip it!