A lot of sensitivity to talk about it? Not really. Marriage= 1 man + 1 woman.
Nothing sensitive about it. Sorry, I've lived with gay roommates, have been to gay establishments dozen upon dozens of times.
It hasn't affected by feelings on the matter (more a matter of confirming those feelings, actually), nor kept me from dealing with gays.
I see no reason to be sensitive. Say what you think. Just don't be an @#$# about it.