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The asymptote is a sexual maneuver wherein the object is to get as close to the vagina/anus without actually entering.

It is a difficult position, though, as approaching the event horizon may result in prejaculation.
The easiest way to preform the asymptote is to, every few seconds or so (depending on how quickly you want to approach), move the tip of the penis half the remaining distance closer.
by The6thDegree June 30, 2008
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