That is what can we be sure we know, or sure that we know we knew it, if indeed it is at all knowable. Or have we simply forgotten it and are too embarrassed to say anything. My God, it's hard enough finding your way around in China town. Sex without love is an empty experience. But as empty experiences go it's one of the best.
Death is an acquired trait.
I do not believe in a afterlife, although I am bringing a change of underwear. It is impossible to experience one's own death objectively and still carry a tune. If you are dressed for it. Where would he eat. Not only is there no God, but try getting a plumber on weekends.