I’m probably doing exactly what they want here (e.g. having a conversation about it), but that letter is called “Eth” and was the Old English way of spelling the “th” sound: https://en.wikipedia.org/wiki/Eth
A number of linguistic buffs want to bring it back to the modern English alphabet.
Same. It’s not even a sexual thing, I just have a shy bladder and physically cannot make myself go if I can feel someone else’s presence nearby, even if it’s not a stranger.