He didn't look crazy

I was just sitting on the subway. There was a big(fat, not muscular) guy next to me. He was a little sweatier than he should have been. But nothing disgusting. He didn't look crazy.
I was listening to music when he tapped me on the shoulder. I took off my headphones for this.
"Do you think that statement makes sense?" he asked, pointing to a sign with a C.S. Lewis quote, which said something to the effect of "Friendship begins when one person says to another, 'You too? I thought it was only me!'"
I hesitated to respond. Then I said, "I guess so. It's a little simple, but the idea is there."
Him: "Heh. I wonder because I just switched faiths from my old one to my mother's Mormon faith. And Mormon's tend to be much friendlier than most people."
I know several Mormons, all of whom are very friendly. So I said, "I could see that."
Less than one second later, he asked, "How many gyms do you think there are in New York City?"
"Gyms or gems?"
"To work out."
"I don't know. A lot."
"You've got Crunch. What else?"
"New York Sports Club, Equinox, Golds... There are tons."
"And Bally's. So at least 5."
"At least. What gym do you belong to?"
"I don't."
He looked at me with disapproval and told me he works out every day. I saw him. He does not. He then recommended I cut all meats from my diet, except for fish. For some reason, I wanted him to like me, so I responded, "I did that a long time ago. Best thing I ever did." Not true at all. But he approved. He recommended some sort of herb to me, and I got off the train. I think the whole time he was trying to get me to say, "You too? I thought I was the only one!"