A man with the smallest penis in the UK is staring in a campaign to promote blood tests and insists ''there is nothing wrong with a little prick''.

Micro-penis man calls for home blood-testing

Micro-penis man calls for home blood-testing

Ant Smith, who wrote 'The Small Penis Bible', is spreading the message about using home blood kits for people to track their health, and has been hired to stand outside a blood test company holding a sign to promote awareness of blood tests, and can also be seen alongside the suggestive slogan on billboards around London, the Mirror Online reported.

Smith is famous for having a 3.5 inch penis and wants to encourage people to check their blood.

The new campaign was unveiled by the blood-testing company Thriva which aims to promote self-testing blood tests.

Ant said: ''This campaign with Thriva is the perfect way to spread the word about preventative health - good mental health and good physical health, what's on the inside of the body, not just the outside.

''While playful it's a serious message, we will all be better off if we properly monitor what's happening inside our bodies that we perhaps can't see in the mirror.

''It's something some people are scared of addressing, even if all it takes is a small prick.''