I can personally vouch for one UL male rider… Cough, cough…
A little off topic but (I think!) interesting – side saddle is s newer thing & wasn’t the prevailing fashion until the 16th century. At least two of Henry VIII’s wives are known to have been riders: Catherine of Aragon, a skilled horsewoman who rode before her husband’s battle-ready troops; and Anne Boleyn, who was arguably the best English horsewoman of her generation. Both are thought to have ridden astride. Catherine de Medici was one of the first trendy women to adopt side siddle.