Measure theorists do it almost everywhere. Measure theorists do it almost nowhere. Mobius Moebius always does it on the same side. Number theorists do it perfectly. Number theorists do it rationally.
Number theorists do it a prime number of times.
Particle physicists Particle physicists do it with different flavours. Particle physicists do it with three colours and anti-colours. Particle physicists do it with Feynman diagrams. Physicists Physicists do it on the event horizon. Physicists do it in waves.