I actually wiped out a metronome to check how the choices affected the rythm, for most choices the tempo seems to be 33-34 bpm.
Short shorts actually decreased it to 28 bpm, navel high stocking decreases it to 26 bpm, combining the two I got to like 21 bpm. Slow deep thrusts.
Haircuts also seem to affect the tempo too. If you use a girl haircut without combining you get the normal 34 bpm, with options [1,1] or [0,0] you get 32 bpm, and with any of the other, if you have the same number for both ([2,2], [4,4], etc.) it brings the tempo up to 38 bpm. Bra, panty and piercing choices don't seem to matter much. The hoodie that reveals the belly and the nightgown bring it to 36 bpm. Sock seem to generally kill the mood, bringing it to 24 bpm, and stockings to 28 bpm Boots bring it to 38 bpm, shoeless to 40 bpm.
And curiously, the locks don't seem to increase the tempo at 34 bpm, is that an error?
Combining the haristyles, going shoeless and sockless, using the hoodie and wearing a lock, I get 47-48 bpm.
Going the opposite way and using navel high stocking, the normal sweater, [0,0] on hair, no lock, shoes and short shorts, I get 22 bpm, seems to be as low as it goes