Well homosexuality being more accepted I guess would be a cultural change, yes, but that doesn't mean there are more gay men now than there were before, it mean

Well homosexuality being more accepted I guess would be a cultural change, yes, but that doesn't mean there are more gay men now than there were before, it means there are more men who are openly gay than there were before. It's a bit hard to tell whether there was an actual increase in gay men due to the known fact that many men hid their sexuality prior to it being more acceptable. I think this is a far more sensible and defensible position and a simpler explanation than something in water, unless that was a facetious comment.