Usually as the age progresses sexual drive decreases this can be associated with menopause in women and also due to other reasons likr systemic diseases such as diabetes or thyroid disorder common these days so rule out all such causes when cause can t be found then another possibility is psychiatric disorder such as depression where sexual drive is reduced and then there may be a hypoactive sexual desire disorder which id usually managed with sexual therapy behavior therapy or couple therapy where both partners need to be involved other causes for avoiding sexual intrrcourse are dyspareunia and vaginismus to rule out such causes see a gynaecologist. A sex specialist and a psychiatrist.