Getting kicked out of his church has nothing to do with whether he's already had sex or not. Any guy who is a Mormon could be kicked out for having sex with another guy. That doesn't then mean they obviously have had sex with men but are just being dishonest about it to avoid being kicked out. It could also just be that... They aren't having sex with men - exactly like David himself has said.
One has nothing to do with the other. Virgins exists - especially in the church. And David claims to be saving himself for marriage. It's pretty common among religious people.
Ah, he pretty much confirmed much of this in his interview...he carried the weight of this secret for a long time and he considered suicide..so no, I'm not projecting at all. And no, this isn't my story. I had sex with a guy when I was 14, had my first boyfriend when I was 17, came out to my parents when I was 18, and have always been up front about who I am. I'm not projecting at all.