British men are dangerously ignorant of the prostate gland, according to Prostate Cancer UK.
It is crucial for sex as it helps produce semen and is involved in ejaculation.
But it is also the leading cause of cancer in men, with 40,000 diagnosed each year.
A survey by the charity showed nearly one in five men did not even know they had a prostate and men were “blind” to the risk of cancer.
Find out more at the BBC