My Capuchin priest for the first 10 years after I came back to the Church was ordained in 1953. He had served in the missions in the South Pacific Islands. One day we were discussing the incident involving JPII in the South Pacific giving communion to a topless native. The lady was older and fat and totally unattractive, a sin against charity. We talked a while and he started to tell me about the topless native girls. He said that almost all of them were not a temptation since there was nothing obscuring the realities of nature and child birth and gravity. He said that the young teens were where there was a big problem, and that it was a constant fight for all the priests.
I find it hard to believe that a woman would be "turned on" at seeing a man shirtless or in shorts, specially the men that most often go shirtless, sweaty dirty men who work under the Sun. Personally, I no longer go shirtless, nor do I wear shorts when I work. I do not go shirtless because I can stay cleaner and drier with a t-shirt that I can dunk in a bucket of water to cool down, or I can change. I do not wear shorts because of the mosquitos, fire ants, spiders, thorns, poison ivy, dirt, oil.