NSFW- (possibly) Women, how often do you lie about feminine health issues to men because you know it won't be questioned?

Two women in their 60’s excused themselves from an event to me the other day because they were getting hot flashes. I immediately agreed, and they wandered off to chat.

A much younger woman explained to me later that they are probably too old to be experiencing hot flashes. I am now curious as to how often I am being victimized by my own male ignorance.