Under the circumstances I think I would have made the same mistake. I had my eyes lasered early last year, and am almost at 20/20 vision, but if I saw someone 60 yards away, with long hair, and who was nearly naked I’d think it was a woman in a bathing suit too.
Also, at that distance SHAKES and his buddy mistook a Speedo for a thong bottom, something impossible to do if you can see the person at all clearly.