Relying on not having to speak is extremely sub-optimal. I'm not sure how many situations you can get in that you have both the time required as well as the ne

Relying on not having to speak is extremely sub-optimal. I'm not sure how many situations you can get in that you have both the time required as well as the need to disguise yourself as someone of the opposite gender. You could pretend to be mute, of course, but this can attract more attention in certain scenarios.