Hi Faith,
I watched the documentary "Do I Sound Gay?"
and thought it was both entertaining and informative.
Apparently the writer and producer David Thorpe who is openly gay, did not always talk the way he does. He developed the "campy" lispy effeminate style of speech, hanging out with his campy, lispy and effeminant friends. Most of the change of his speaking style took place in his early college years once he left the house.
The documentary is careful to also show that there are also straight men who sound campy, lispy and effeminant.
So one can "imprint" on those who they spend a great deal of time around and also those who are role models according to some of the films speech experts. This is one of the most common ways we as humans mimic the voices around us. Sometimes subconsciously and sometimes on purpose.
So the answer is???? There is no concrete answer.
The Film indicates it is a stereo type to be sure but also one that is acted out on purpose to the point of sometimes becoming habitual.
Watch the documentary if you get a chance.
Edited by 1.61803, : change speach to speech
Edited by 1.61803, : added David Thorpe
"You were not there for the beginning. You will not be there for the end. Your knowledge of what is going on can only be superficial and relative" William S. Burroughs