While toying with their six models, the researchers saw that if the bathrooms remained separate, women required five more toilets than the men — a space increase for the ladies' room and a decrease for the men's — in order for their wait times to be more proportionate. Another scenario where the women's room also needs to be larger to accommodate two more stalls, men still got in and out in under 40 seconds while the women waited for nearly two and a half minutes.