Cut sleeve
“Chinese literati have referred to homosexuality as “the cut sleeve” since the first century BC, when a Han Emperor whose male love was sleeping on his sleeve, cut it off in order not to wake him when he needed to get up himself.
(Frits Staal, IIAS Newsletter 32/Nov. 2003, p.6f., article titled “The future of Asian Studies”, funny bits and pieces, not more, sometimes less.)