For female on male, this position works even better. Though a variety of stools and special sex chairs are made just for this position, in practice you can just have her straddle your face with her thighs and lower her crotch onto your lips, with her choosing to apply the pressure any way she wants to. The warmth, pressure, taste and wetness of this position make it a truly immersive oral experience.
So, what do you think? Odd enough for your taste or... even challenging?