Dear Dr G, I am in my late 20s and have an active sexual life. My partner and I have sex regularly – sometimes even twice a day.

I email you with alarming concerns about my sexual performance.

I read with interest how honeymoon cystitis can affect the newlywed and raise concerns of trust in a relationship.

I am emailing about an embarrassing problem a newlywed couple, my wife and I, are facing.

I read with interest the articles you posted a few weeks ago addressing issues of the average size of the penis and I feel very self-conscious about my own “asset in the pants” and constantly feel very “short-changed”.

Despite the development of modern forms of contraception, the "withdrawal" method remains one of the most popular methods of birth control.

Although pre-ejaculatory fluid, or colloquially known as pre-cum, is emitted during arousal, foreplay and early stages during sexual intercourse, the secretion is variable between individuals.

Although many scientific data supports the benefit of masturbation such as relaxation of heart rate and blood pressure, such self-indulgence is not exactly risk free.

The fifth decade of life witness changes in achievement, success and health. Some changes may be invigorating and exciting, others can be difficult and challenging.

I would really appreciate your frank opinion about my shrinking testicles. I am in my mid-40s, a father of two, and have been facing a shrinking “crown jewel” in the sac for the last three years.

It celebrates 21 years of shaping 'diamond moments' for couples in their bedrooms.

Dear Dr. G,