The first person has  a male physique; the second has a female physique. What's the problem? 

I expect you are going to tell me that what is found in their groins is incongruent with their apparent genders; I will say that VISIBLE physique is what counts. Every washroom I have ever been in had stalls as well as urinals (I haven't been in many women's washrooms, but the ones I have seen had all the toilets in individual stalls.), so it is not necessary for the contents of your pants to be visible to anyone else.