Tmi need advice

He asked me to lick his butt hole I said that I didn't want to and he got upset I know 100% he's not bi sexual or gay and wants nothing to do with men I don't know if he was joking or being serious I couldn't tell I don't know why he asked this but I don't know if I should consider it I think is kinda weird lmk have you done it or what do you think