An inoffensive and affectionate word to describe anybody hailing from the village of Treforest, South Wales, who by geographical location is inherently a Treftrosexual. It means there are no boundaries to guy-love, man-love, inter-gender love, transgender love, for all the inhabitants... particularly those who drink in the Pick and Shovel on a weekend!!
Why is that guy sat on the other guy's knee? Because they're Treftrosexuals