Like red wine and a fine cheddar cheese, certain things just get better with age. For some people, sex is one of those things that blossoms over time. But for many others who find themselves in long-term committed relationships, it's easy to wake up one day and realize they haven't had sex with their partner in months or even years. There are plenty of reasons you might lose interest in sex. Sometimes it's related to physical or mental health, or tied to deeper issues in the relationship.

Let's dispense with the old-people-have-sex jokes , shall we? As the STD rate clearly indicates , people 60 and older are indeed having sex -- and plenty of it. But are they having the "right" kind of "safe" sex? And by right and safe, we mean sex that won't throw out their backs or hurt their knees -- two very vulnerable areas.

Listen, we all have different sexual preferences. Whether we prefer to be more in control, let our partner take the reigns , or simply want to do whatever will help make a baby , there's a sex position that suits your needs and comfort level. To figure out what works best when , we tapped into the brains of top female sexual health experts. Here's what they say are the best sex positions for common bedroom scenarios. Obviously you can get pregnant just by having sex.