Being manlet is proportions mainly not actual height.

[Doesitmatter?]

And not below 5'7 btw. There are 5'9 manlets @JohnDoe and 5'6 slayers. It's all about the proportions

 

[Surfsup]

Long neck+ low shoulders at 5'8 looks like ur 5'6
While good proportions with a decent frame makes u look like 5'10 at 5'8

 

[PoopyFartGamer]

Yes only when ur 1on1 with the girl. But in a social setting, having everyone towering over u while ur with a girl is a giga failo, even if u have the best frame and proportions in the world