i bet they look pretty normal the only reason they were the mask's and suit is becaus they live on planets with CO2 instead of O2.
But it is weird how every female humanoid alien has only 2 boobs what are the chances and maybe in ME3 we will see some full frontal alien nudity
Incorrect. Quarians are forced to wear environment suits becuase of years of living in the sterile environment of the Migrant Fleet.
masseffect.wikia.com/wiki/Quarian