A: Several factors can be at work here. Too much stress, certain medications and health conditions, or out-of-balance hormones can send a man's sex drive into decline. And just as with women, the quality of your relationship matters...

When men don't feel appreciated or effective as a spouse, low libido can rear its ugly head. Whether it's feeling appreciated when working to provide for a family or feeling connected to another amid life's harried pace, a man's emotional needs definitely factor into their desire for sex.

The first approach for getting to the bottom of low libido is to rule out any physical causes. Evaluate his medications and have him get a complete physical, including blood work to check testosterone levels. If a medical problem is discovered, lifestyle changes or even testosterone replacement could be the answer. Many options exist.

If the cause is not physical, take a look at your relationship. Does he feel valued? Is there an unresolved conflict or resentment in either direction? You may want to consider a few appointments with a therapist to explore what's causing the drop in libido and get yourselves back on track.