I’m only aware of care for specific bodily functions or behavior, none that is actually tied to sex.

@OP When you have continue session on, closing Firefox using burger menu->Quit restores all windows. I assume this will also keep the pins even without continue session.

Nope, this feature has existed forever. They just changed the shortcut, previously it was Ctrl-shift-T for re-opening the last closed tab and Ctrl-shift-N for re-opening the last closed window.