A friend of mine, that I had known for some time, came up one day with an old guitar. I don't know where he got it, I don't know how long he'd had it, but he knew about two chords on it. He proceeded to teach them to me, and then we proceeded to go crazy over music.
If we change the definition of marriage to be more inclusive, then it is logical to argue that we should broaden the definition so that won't exclude anyone.
Science doesn't in the slightest depend on trust. It depends completely on the belief that you can demonstrate something for yourself.