However, persistent, long-term problems getting and maintaining an erection hard enough to have the type of sex you and your partner want is known as
erectile dysfunction (ED) or impotence. ED does not occur because of
loss of interest in sex (libido), lack of strength or manhood, sterility, lack of hormones such as testosterone. It is not a natural consequence of aging. It is due to psychological reasons, relationship problems or drugs, rather than any other physical causes.