pocketnico saidMaybe you're talking about guys from Spain since the Castilian accent sounds "lispy" and rather harsh to Latin Americans
Are you serious? Have you ever been to a big city. The lispy "S" sounds are everywhere; you can here it a block away. It's not the same as a feminine voice, but the two usually go together.
Some straight guys have the lisp, but it's much less common.
I've heard in other languages, like Spanish, there is a distinct gay way of pronouncing certain consonants.
I suspect its partly from birth since so many gay men have the lisp from all over the country (e.g., having lived in Miami, NYC, Toronto, LA and Seattle, I've heard it everywhere).