Also known as: 隐形阴茎
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.