Gogglebox's Graham Norton horrified as blind fish have sex with 'spunk everywhere'

Celebrity Gogglebox star Graham Norton was horrified as he watched blind fish have sex on television.

The talk show host was speechless as the documentary on-screen showed "spunk everywhere" as the flatworms mated.

Graham was part of the Stand Up To Cancer segment with Michelle Visage and the two ended up throwing words of encouragement at the TV.

"Here's your chance, go!" Michelle said at no one in particular.

After seeing the flatworm's sperm floating around, Graham was groaning in disgust as Drag Race judge Michelle pointed out: "Look at the white stuff on the back! Quite a big load for a flatworm."

They were shown a clip of flatworms mating (Channel 4)

In the documentary scene, the flatworm who did the impregnating swam off after the deed was done.

Rob Delaney, who was watching the segment with Aisling Bea, joked: "Will the impregnator at least visit at the time of birth, bring a cigar...?"

Meanwhile, as the scene went back to Graham, pal Michelle added: "It's rough down in the ocean."

"I mean, it's beautiful but strangely depressing," Graham answered.

Flatworms have both egg-producing ovaries as well as sperm-producing testes.

The creatures will 'fence' using extendable dagger-like rods that will pierce their mate's skin and inject sperm into them.

Learn something new every day.

Graham was speechless (Channel 4)

Get all the biggest showbiz news straight to your inbox. Sign up for the free Mirror Showbiz newsletter.

At the beginning of the documentary segment, the stars got their first glimpse of the strange mating ritual.

Rob quipped: "I know what that is! Don't squander it" before Aisling added: "Need a box of Kleenex."

Celebrity Gogglebox was aired as part of a special night of television for Stand Up To Cancer to raise money for Cancer Research.

Those part of Gogglebox includes Michael Sheen, Kalvin Phillips and Matt Lucas, Kalvin Phillips and Aitch, Suranne Jones, and Adam James.

Regular Gogglebox stars taking part included besties Jenny and Lee, Blackpool siblings Pete and Sophie, London couple Marcus and Mica as well as the Siddiqui family.

Gogglebox returns to screens next Friday on Channel 4 at 9pm.

Do you have a story to sell? Get in touch with us at webcelebs@trinitymirror.com or call us direct 0207 29 33033.