Sexuality in elderly people is a subject usually met with silence. Doctors are sometimes not prepared to talk about it, while the affected people can feel ashamed or are worried they will hurt either their partner's feelings or their own.
Sexuality changes as people grow older and sickness can also play a role in the love lives of senior citizens.
"Talk about your feelings of shame and fear. You'll be amazed how positive your partner will react," advises Prof. Wolfgang Berner, head of the Department of Sexual Research at Hamburg University.
The human body changes as people grow old; the skin begins to sag and our muscles weaken.
But at the same time, sexuality changes as well. In men, erections become more infrequent and periods of impotency are normal, according to Kirsten von Sydow, a psychologist at Hamburg University.
In women, the lining of the vagina becomes thinner, drier and more sensitive after the menopause.
In addition, to those natural developments come illnesses that can affect sexuality.
Diabetes or high blood pressure cause blood vessels to narrow, which in turn can lead to erectile dysfunction in men, according to a brochure produced on "Sexuality and Growing Old" published by the German sexual health organization Pro Familia.
Erectile dysfunction can also happen when the prostate gland enlarges or if a tumour is removed. Elderly women can feel uncomfortable with their bodies, especially when they become scarred such as after a mastectomy.