Between World War I and World War II, straight guys could have sex with other guys and still be perceived as straight as long as they acted masculine. Whether you were considered a “fairy” or a “queer” back then wasn’t based on sexual acts so much as outward behavior. Into the 1950s, 1960s and so on, the straight and gay thing came up based on your sexual partner. Because of those labels, you do it once and you’re gay, so you get fewer guys who are kind of in the middle zone. It sounds as though I’m advocating for an ambiguous zone or something, but I’m just interested in the way perception changes behavior.