Bearded men are making hilarious optical illusions by taking pics of their necks

It seems one of the advantages of having a beard is that it presents one with endless comedic opportunities.

These men are 100% taking advantage of their impressive facial hair, by turning it into what looks like a faceless head.

By simply taking a picture of their beards from underneath while looking upwards, a triangular-headed man is born.

Following the original tweet, a few men decided to take on the amusing challenge and post their impressive and varied results on Twitter.

But, like all great internet trends, the fun did not stop there – some proceeded to draw on friendly facial expressions.

What a fab idea – and a valuable contribution to the meme vault.