Gays can do whatever they want. As far as the whole gay marriage thing.. I will NOT vote for it until I see PRECISE wording that churches are protected from discrimination suits for refusing to perform ceremonies for gay couples.
As far as Sean Penn goes, he can take his self righteous, condescending ass and jump into a lake full of rabid alligators. I can't stand Hollywood's self importance, and how they have 4011 award shows to make themselves feel important, and he is a prime example. He makes his living by reciting memorized lines in front of a camera... that does not give him any authority in any kind of world affair.