I remarried in 1990 and for many years our sex life was great, but it declined over time to non-existent. I am now 72, my wife 66. While on vacation to the ocean, our favorite place, she regained interest in sex, and it became a passion that I can’t understand. Now home, we are going to bed naked, listening to our favorite music till 2 a.m. I am so bothered by my inability to get an erection, as in days gone by, she says it does not batter, but to me it does. What to do?