As I understand it, Romans didn’t consider the “pitcher” homosexual, only the “catcher”. That’s why the barb in the saying about Caesar used by his enemies was that he was the catcher. Started when he spent time as a young man at the court of King Mithridates.
At his triumph, after the Gallic campaign, the legionnaries preceding him in the parade sang a ditty warning all the Roman men to lock up their wives and daughters because Caesar was in town.
Yes, that is my understanding too. The penetrator was thought masculine, the penetratee feminine, and therefore inferior.