A third data point
Of possible interest in developing a universal theory of hotness are these pictures of mathematicians in sarongs, proving theorems (no, really). I quite like Alexander's theorem, while the woman proving the Bolzano-Weierstrass Theorem is cheating by actually being attractive (as far as I can tell). The Invariance of Morse Homology amuses me and Hahn-Banach has a pleasant intensity.
ETA here is a mathematician proving the Artin-Wedderburn Theorem while wearing a tutu