invisible penis
A technique in which, during sex, the penis and, generally, body of a man are rendered partially or completely invisible so as to allow a clear view of his partner's body. This means that the receiving partner's orifice will appear to be opened in a clear circle for no apparent reason.
Be careful not to confuse this with gaping, which is an orifice that remains open after sexual intercourse.
See also
The following tags are aliased to this tag: invisicock (learn more).