I won`t delve into the causes of crotch grabbing, as it would lead us off topic, right away...

Instead, I will focus my attention on crotch-grabbing IN PUBLIC; Which is the real issue here (and everywhere else, too)

It might be a "valid" response, triggered by many factors, whatsoever...

First of all, for the sake of simplicity, let's rule out some conditions, such as:

- Poor hygene

-Mild irritation/allergic reactions from/to any source

-Chronic or acute, medical conditions (STD, hernia, wounds, trauma) 

That leaves us with the most popular and common version of them all....

....and that is, the Crotch Grabbing Habit.  

A learned behaviour which turned into an involuntary response, AKA 'habit',

It can be, a justified, or a non-justified reaction, but what really matters is that, MOST people around us, find it annoying, offending, rude and unnecesary...

That is, without mentioning, what a turn-off, is to our SO, and girls in general, much more than cursing, spitting, and nose picking; Only second to farting.....

Very common among men in latin american countries, where it has escalated to unbearable proportions...

please take a look >   Italy Bans Crotch Grabbing In Public : "Self-Groping & Scratching Prohibited"

It is commonly related to low-educated people, regardless of fame and/or fortune....

....a classic example > Major league Crotch-Grabbers

By the way, I'm a man, and do all the usual 'men stuff' (sports, drink, curse, racing, etc), but everytime I see one of my friends go for 'the gold' in public, I ask him, "is it still there, man"?, just so he takes control of his actions...

It can be a "natural" thing to many, so it is pissing, sex and masturbation, but I don't see they doing, any of them, in public....

It's not classy, sexy, nor healthy, and it doesn't inspire anyone, shaking hands with the "grabber boys", for sure... LOL

...It's just an observation, from my point of view....

Regards

~H~