A top is a person who engages in the penetrative role in sexual intercourse; for men, this involves penetration using the penis during vaginal, anal or oral sex.[1] Top is also used as a verb meaning "to penetrate another." Top may also describe a broader personal identity involving dominance in a romantic or sexual relationship; however, this stipulation is not a requisite element of being a top.
Several related terms exist. With regard to gay male sexuality, a total top is one who assumes an exclusively penetrative role for both oral and anal sex. A total top by definition never assumes a receptive role for either oral or anal sex. A power top is one noted for their great skill or aggressiveness in topping. A service top is one who tops under the direction of an eager bottom. A versatile top is one who prefers to top but who bottoms occasionally. An oral top by definition does not engage in anal sex and is the exclusively penetrative partner during oral sex.[2] The terms penetrative partner or giver are synonyms of top created to describe the act of penetrating without implying non-egalitarian relations among participants.
Trevor Hart of the Centers for Disease Control and Prevention found in the 2003 publication of The Journal of Sex Research that self-identified tops were indeed vastly more likely to act as the penetrative partner. The study also found that a top is also more likely to act as the penetrative partner in other sexual activities, such as oral sex and sex toy play.[3]