"Tony Stark: Poor Jeanne! She probably thought I was trying to avoid her, but I couldn't go swimming! I can never appear anywhere bare chested because I constantly wear this iron chest plate. Just as other men plug in their electric shavers for their morning or evening shave, I must constantly charge up this plate which gives continued life to my heart! My ticker would stop beating if the plate were removed or didn't receive its regular booster-shot! Ah!... Electrical energy is pouring back! Now I can continue living...to help humanity as Iron Man!"
January 1, 1970
https://en.wikiquote.org/wiki/Iron_Man_(comics)