Kit Roberts
It's a hypothesis which many who are attracted to men have to wrestle with - how to tell whether a guy is well-endowed without actually seeing for yourself.
Apparently, there have been many 'techniques' over the years.
Some believe there's a correlation with hand size, so if a chap has big hands you supposedly know there'll be something impressive down there.
Likewise, others instead swear by foot size - the bigger the feet the bigger the, erm, shoes.
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While there's not much scientific evidence to support these ideas, there may be another way to work out if someone is packing - just match with them on a dating app and unfortunately some might show you whether or not you actually asked to see.
But members of Gen Z claim they have come up with an alternative method of being able to tell.
This is less based on anatomy so much as it is on someone's general vibes.
It's not 'big d*ck energy' so much as the 'hung smile'.
Zachary Zane, the sex and relationship expert for Grindr, explained how it works: "A hung smile is a specific, knowing smirk that exudes confidence and suggests the man smiling is well-endowed.
"It’s rarely a big, teeth-baring smile, there’s usually a subtlety and a hint of naughtiness, giving the impression that they’re hiding a big surprise in their pants."
Of course, there is no actual connection between someone having a cheeky knowing smile and their having an asset that would do credit to a thoroughbred racehorse.
Zachary said: "There’s no scientific correlation between someone’s smile and their penis size, this is purely a playful cultural shorthand. But there is something to be said about the quiet confidence it conveys, and the way the queer community innovates visual language when explicit nudity isn’t permitted."
Nonetheless, the trope has persisted and become popular on social media, with some people even ascribing it to some of their favourite celebrity crushes.
And just because someone is well endowed doesn't necessarily mean that they're good in the sack.
After a certain point a particularly large specimen might even become more of a hindrance, particularly if it causes discomfort or pain to a partner.
And to address the gents who may be out there - if you're the sort who likes the company of women, you'd do well to remember that there's a lot more to her pleasure than impersonating a jackhammer.