This. Think back to your high school drama or theatre class, or if you went to college, the theatre group there. What was the ratio of hetero to gay men in either group?
Why would the acting industry be any different?
Not just that, but the hollywood actors are the best of the best of those groups, meaning whoever liked to memorize show tunes the most and wore the most makeup made it. so yes, they're all gay.
here's a photo of marlon brando sucking a dick:
![](http://male-erotika.com/wordpress/wp-content/uploads/2009/04/marlonbrando-blowjob.jpg)