According to many posts, that is not exactly true.
Joe Biden Facing Ridicule After Revealing He "Sits On The ...todaysfive.com › U.S. News
And to remove any and all doubt, he later confirmed that he does in fact sit on the toilet backwards. What's worse? He didn't know he was sitting on it backwards…
https://todaysfive.com/joe-biden-facing-ridicule-after-revealing-he-sits-on-the-toilet-backwards/