Well... there have been LOTS of them over the years.

But one, in particular, that comes back to me (from many decades ago when I was a teenager) involves the fact that, as I now realize, I was (and still am... I suppose) what is nowadays referred to as transgender (MtF). As a teen I used to crossdress in my bedroom on a regular basis. But my GID was something I learned very early in life I must never tell anyone about. So no one knew. (I didn't even understand it at the time.)
One evening my father opened my bedroom door (without knocking) to hand me a bowl of popcorn and there I stood dressed from head to foot in some of my mother's old clothes (I was an only child.) Plus, I was wearing a long hair braid I had fashioned from some old black knitting yarn I found somewhere. (My mother didn't knit. So I don't know where it came from.) Anyway... it took some
fast thinking to come up with a rationale for why I was dressed the way I was. I told him I was pretending to be a witch! (LOL) He handed me the bowl of popcorn, scowled, said: "Jesus, bud"

and closed the door. Nothing more was ever said.