For women who've never had children, the lips turn from pink to bright red. For instance, your nostrils will flare in response to heavy breathing, and your back might arch involuntarily, bringing you closer to your partner. All of these things will resolve during the minutes and hours after sex. Many women report feeling very different on a physical level, with significant body changes that can be so prominent to them, they might wonder if others notice it, too. Simple tips and treatments for the sexual side effects of menopause include: Also, harsh thrusting may be a cause of pain. First, seminal fluid collects in the urethral bulb. Again, atrophic vaginitis stems from reduced estrogen levels and can cause pain, swelling, itching and burning. Video of the Day And yes, there are people who study this for a living. They might have flushed and red skin or bright, shining eyes. There will probably be a thin layer of perspiration all over your body. Drink tons of water and remember to clean your vagina and keep it clean. The testes are drawn up into the scrotum. The amount of time varies among men by age, physical fitness and other factors. Regular sexual stimulation helps promote blood flow to the vagina. It's certainly not enough to replace your daily workouts, but every little bit helps keep you active and your heart healthy. Many of the physical changes that occur with aging can also intensify the emotional symptoms of menopause.