I live alone because my gentleman friend lives 600 miles away. When he visits, he sucks and rubs my nipples alternating with me turning around and sucking on him and lightly scratching his testicles, and together we get very hot and ultimately orgasm. It's pure heaven. But when he is not here, which is most of the time, I love to lie on my back in bed and simultaneously rub both nipples rhythmically. I can feel a direct connection between my nipples and my clitoris (and, if I stimulate my nipples long enough, my g-spot just inside my vagina). Sometimes I also can suck my own nipples if I lie in the right position. Stimulating both nipples at the same time makes the excitement almost unbearable. I do this almost every night, at least five times a week, sometimes before sleeping, and sometimes if I wake up aroused in the middle of the night or early in the morning, for as long as I can stand it (it's both pleasure and agony, so sensitive are the nerve endings). I do this for as long as 20-30 minutes, until I'm so aroused I'm on the edge of orgasm, and then I press my vibrator (a Hitachi Magic Wand) into my crotch and come almost immediately. By the way, I am 74 and my gentleman friend is 77, so please don't worry that sexual pleasure has to end with age. Keep your nipples and your partner's penis and scrotum stimulated (if he lives away he should stimulate them himself till you're back together), and you'll discover it will get, if anything, better.