Is it common in either language (or perhaps English is used in this context) to make fun of things that disgust you by calling them gay? Growing up in the Midwest of the US in the early 90s, I knew to call things 'gay' if I wanted to discourage my friends from doing them much earlier than my Christian parents allowed me to find out the secret of males/females having different genitalia. (A much younger neighbor boy finally leaked the secret to me when I was 12.)
Society finally seems to have figured out that using ‘gay’ as an insult is homophobic and wrong. However, on the way to that realization, we did have to go through a long period of various groups of people insisting that they had their own special definitions of ‘gay’, ‘fag’, etc. that allegedly had nothing to do with the ordinary meanings of these words. It retrospect I think it’s clear that protests of this sort were all entirely specious (with the exception of young kids who simply didn’t know what they were saying).
Like the extensive racism in Fresh Prince, the homophobia in Friends is brushed aside because "it was the 90s"