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1.
a vertically challenged person (usually female) used for sex purposes. often used to lure attractive females into compromising situations.
My sex dwarf is making it with my dumb chauffeur
by Syn Tower March 02, 2005
 
2.
A human that is exceptionally small in all areas except for the genital region. To qualify as a sex dwarf males must have an average or larger than average penis. In comparison to the rest of the frame, it will look even larger by proportion. A female sex dwarf is fully capable of having sex with an average sized man, and has been referenced to as a sex toy in many pop-culture references.
'He was only 3 feet tall, so Sheila thought she wasn't in for much fun... until she felt the enormous bulge in his pants! That sex dwarf rocked her world!'
by Ismirth May 24, 2007
 
3.
A degenerate form of Ephebophilia, a "Sex Dwarf" is an underage male, usually between the ages of fourteen and sixteen, who willingly participates in homosexual sex acts (e.g., orgies) with older males over the age of twenty.

The resulting sexual acts often include bukkake, among other things, and are always done with the consent (often enthusiastic) of the boy in question.

"Sex Dwarves" are always boys with large gential endowments, despite their age, and are valued for being "innocent" and young.

Use of boys as "Sex Dwarves" is occasionally found in dominant practitioners of BDSM, where the "Sex Dwarf" in question is always the uke ("bottom"), and are often the subject of extreme forms of humiliation (e.g., being put on a leash like a dog).
"They all love your
Miniature ways --
You know what they say
About small boys..."
__________
Soft Cell, "Sex Dwarf"
by The RS October 18, 2007