It's official; Calum Best has shared his most explicit snaps yet on Instagram.

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The 33-year-old stood smiling and completely naked in one of the images, with his hands gently cupped around his private parts.

In a photograph alongside it, the ex-Celebrity Love Island star decided to drop his hands and show off his manhood in all its glory - but, at the last minute, he decided to pop it into what can only be described as a black sock.

Captioning the eyebrow-raising images, Calum wrote apologetically: "Sorry to those of u who deffo don't wanna see this!!! But a little peak at my nude shoot for The charity @checkemlads in GT mag."

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That's right; Calum is urging lads to check their bag-less balls for signs of testicular cancer.

He reposted an image from Testicular Cancer UK, writing proudly: "And this is why these nude shoots r done ! Proud to raise money and awareness for charity @checkemlads"

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Whatever the reason, Calum's fans seem VERY happy about the snaps, with one writing: "wipes up drool haha if you ever need a hand checking them ;-)"

Another added: "Praise God to whom all blessings flow!"

What do you think of Calum's photos? Let us know via the Comments Box below now.