cruxlover
Tribune
I don't believe that ancient galleys had sliding seats - so no testicular problem, unless you sat on them of course.I did some rowing in my early days and with these flimsy sliding seats you want at least some pants, otherwise your testcles might get caught in the mechanism when you have just put all your strength into a really good pull.
Women's nude galley rowing could be nasty - "catch a crab" and get bashed in the boobs by the oar's loom.