Leopold "Poldy" Bloom. Molly, his wife. If I'm not mistaken, on Bloomsday, June 16, he kept a pair of Molly's panties in his pocket. That's one way to keep her on your mind. Or in the penile colony a yard or so south. (Well, it's not as if mind is just up in the skull, eh? The fine book Descartes' Error by Dr. Antonio Damasio explores that.)
Way to go, Leo!