A challenge that's common in couples across the spectrum is maintaining an intimacy spark. The excitement of intimacy often ebbs for couples over time. The excitement can also disappear entirely.

Lack of sexual interest is often the hallmark indicator that lessening passion between couples has set in. A regular course of sexuality becomes burdensome in couples who've seen a significant drop in passion levels.

The lack of an interest in sexuality isn't a trivial matter. Poor levels of physical intimacy between couples can motivate infidelity. In this regard, bad sexual relations can literally end a relationship.

Lack of sexual dynamism is rarely the sole problem in a relationship however. Relationships, especially intimate ones, require work to maintain, and this work has to occur on various levels.

Still, a growing number of couples are dealing with lower passion levels by focusing on a familiar target: improved sexuality. And one of their main points of action is purchasing sexual enhancers.

Using intimacy aids isn't anything new. The so-called sexual revolution during the 1960's and 70's encouraged couples to explore and expand their intimacy, and if using sexual aids, or aphrodisiacs, was something that couples wanted to do, then more power to them.

Sex stimulators, aphrodisiacs, of the past were essentially home remedies that didn't work consistently, if they worked at all. Viagra was the first thing proven to make a difference in sex performance, albeit Viagra did this in the treatment of a physical dysfunction.

Soon after Viagra's appearance, sexual enhancement specific products -- as opposed to medical treatments -- began to appear. These products were nonprescription and could be purchased easily.

The market for these nonprescription enhancers is couples strong. Many of the couples using enhancers want a better sense of passion overall through better sexuality. The sales of nonprescription sex enhancers are way up.

So the obvious question becomes whether using sexual enhancers to encourage an improved sense of passion in a relationship is a good idea. This much is clear: using sex enhancers will never bypass the need to work at a relationship. There's an effort required. Honeymoons don't last forever, after all.

Having said that, a fulfilling sex life is vital to a long-lasting intimate relationship. Using mutually acceptable methods to maintain rewarding physical intimacy is a perfectly legitimate strategy.