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.
Hey christofash men, if everybody is entitled to their own personal and private relationship with god, and you should love god as he loves you, it’s totally legal for your wife to think about god’s massive peener while you’re having sex strictly for the purposes of procreation. Just noodle on that for a bit.