You walk off the plane in Rio, and your blood temperature goes up. The feel of the wind on your face, the water on your skin, the taste of the food, the music, the sexuality; Brazilians are very comfortable in their sexuality.
If modernist naturalism were true, there would be no objective truth outside of science. In that case right and wrong would be a matter of cultural preference, or political power, and the power already available to modernists ideologies would be overwhelming.