"Standing Sex" is a single released by X Japan (then named X) on October 25, 1991.
It and "The Last Song" are the only X Japan singles to not appear on one of the band's studio albums. The b-side is an edited version of "Joker", originally on their album Jealousy.
The song reached number 4 on the Oricon charts, and charted for 16 weeks. In 1991, with 187,160 copies sold was the 87th best-selling single of the year, being certified Gold by RIAJ.