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Many men worry that their penis isn't as big as it should be, but research suggests most men underestimate the size of their tackle.
We look at the wild claims and potential harms of the different penis enlargement treatments on the market.
How well do you really know your penis? Find out the five penis facts that every man should know.
Find out how to keep your penis and testicles clean, healthy and fit for purpose.
Boys' questions about puberty, including growing hair, erections, deeper voice and wet dreams.
Find out what testicles should look and feel like and how to spot problems.
Is masturbation normal, and is it possible to masturbate too much? We sort fact from myth to answer your questions.
Learn about the symptoms, causes and treatments for Peyronie’s disease.
Summary of male sexual problems, such as not being able to get or keep an erection, and premature ejaculation. Links to in-depth information.
Answers to sex FAQs, including saying no, what to do if a condom splits, being gay and more.
What to expect at an STI clinic, including tests, treatment, and the questions you may be asked.
Take our quiz to see how you score
Millions of people have already had their free 'midlife MOT'. Find out why this health check-up is so important
Your health, your choicesYour health, your choices