The Roman Empire collapsed centuries ago. I'm talking specifically about the claim that gay sex was considered normal before the 1950s, so let's say 1900-1949 i

The Roman Empire collapsed centuries ago. I'm talking specifically about the claim that gay sex was considered normal before the 1950s, so let's say 1900-1949 in Britain. Where is the evidence that in 1940 a guy could engage in gay sex and consider it normal and what the hell happened between then and 1952 when Turing was chemically castrated for engaging in gay sex?