The span of historical time during which an organization enjoys the best personnel lineup it will ever have. The phrase derives from the name of the virtuoso lead guitarist of the Rolling Stones, 1969 to 1975.
When your cis male partner or friend has a symbolic period (when you as a cis female have yours).
A sympathy period can surface in the form of their increased irritability, making the same space you take up unbearable, or as their literal dick bleeding.
"Yo Liv, has it ever happened when you're on the dot and trying to milk every minute of sympathy and then your manz one ups you with a sympathy period and his dick starts bleeding when you're giving him head?