Actually with a new invention discrete peeing for females is possible, even standing http://www.amazon.co.uk/dp/B00200LO7Q/? ... dx0ekwnt_e" onclick="window.open(this.href);return false;bustedflush wrote: And it's not as easy for females to have a quick disguised one as it is for a man.
However, as said before there are other sanitary considerations males don't have to consider, and would any father, or mother expect their daughter to knock on a strangers door as a matter of course.
Also calling back to the DO when you need the toilet in those circumstances is allowed and could open a can of worms if it was refused.