I posted this last year, but the natural birth-marks on males are taken from a design that some big cats have, such as a cheetah. Female birth-marks are taken more from domestic short-hair breeds such as a tabby.

Not sure why everyone seems to hate these differences, they bring more personality to each sex rather than them all looking the same. If anything, what they need to change for males is their atrocious posture and their hands (which look like they just had 14 espressos). Compared to all the other races and sexes, male Miqo'te look way too out-of-place with how "on-edge" they appear.