I thought that title would get your attention!
On the Dublin-Frankfurt leg, 2 women wearing extremely comfortable shoes sat across from me. Or at least I thought it was 2 women. With one, I wasn't so sure, especially when the groping started! S/he was one of those who could have been a man with not quite enough testosterone or a woman with a little too much. I wasn't certain until s/he inadvertingly hit me on the head with her hand luggage (I probably deserved a smack at that stage!) and apologised in a feminine voice.
Still, an excellent start to the long journey!