Doggy style came in first for favorite sex position among respondents who identified as bisexual or gay in one survey of U.K. and U.S. respondents conducted by DrEd.com.
When a [bottom] stands on [his] hands and feet like a quadruped, and [his] lover mounts [him] like a bull, it is called the "congress of a cow."
Source: كاماسوترا
Doggy style, also spelled doggie style, is any sex position in which a person bends over, crouches on all fours (usually on hands and knees), or lies on his or her abdomen, for sexual intercourse, other forms of sexual penetration or other sexual activity. Doggy style sex is a form of a rear-entry position, the other being with the receiving partner lying on the side in the spoons sex position.
In ancient Rome, this practice was known as coitus more ferarum, Latin for "sexual intercourse in the manner of wild beasts". The specific origin of the term doggy style is not known, but is presumably a reference to the initial position assumed by dogs when mating. It is described in the كاماسوترا as the cow position or the congress of a cow, and is listed in The Perfumed Garden.
Learn more about doggy style from Wikipedia.
A man positions himself behind his partner, and inserts his d*ck into his [partner's hole] from behind. [The partner's] usually bending over something, or on [his] hands and knees. The [top] can then pull [his] hair, and use [his pecs] for handles.
My favorite sexual postion is doggy style! I love it when the [top] has all the control!
Source: Urban Dictionary
one of the best sex positions of all time; the [bottom] gets on [his] hands and knees and the [top] is behind sticking his dick into [the bottom's manhole]. it also gives the [top] a great view of [the bottom's] butt. talking from experience, it might be easier for the [top] to hold onto your hips or [pecs] as he penetrates. be warned that it can hurt the first time.
man and [partner] get into doggie style position....
[partner]: *groans* ah baby i love it when you do that. push harder...
Source: Urban Dictionary
The more traditional sex position, where the Receiver is on all fours, while being penetrated by the Giver. Many variations exist of this particular style.
Learn more about doggy style from GayDemon.