Historical clue formulations

• Shape describing a complex love relationship — 2022-05-10
• Word with love or right — 2020-07-14
• It's right in the Pythagorean theorem — 2017-03-01
• Amorous complication — 2001-07-19
• Rack shape — 2000-04-29
• Marital situation — 1997-02-22
• Y.M.C.A. logo — 1996-06-11