Zack frowns, making sure to give the expression a suspicious edge as well.

"You... don't? I thought you... You're not fucking with me, are you?" He says carefully, mind working quickly as he tries to figure out how to spin this. If he tried to wave it off, perhaps the priest would get curious and try to figure it out a bit more. Of course he might very well get some sort of noble idea in his head about 'respecting his privacy' and then there would just be the spectre of a secret hanging between them creating more distance. No, perhaps he should just out with it and take the chance to give the priest the sense that he is being trusted with something. Showing vulnerability will probably reinforce the 'little one' bullshit for a bit, but at least there would be the appearance of a foundation of trust to work from. 

"You don't have to do anything to make me feel unwelcome here," he starts off haltingly, "there's been plenty of so called 'holy men' before who made that exceedingly clear to me." He crosses his arms in front of him, as if to steel himself for rejection. Kiel seems to like breaking through emotional barriers, so lets give him one to break through. 

"The truth is, I don't belong here. I'm headed straight to hell and perdition or whatever. Supposedly." He shifts uncomfortably in place, breaking eye contact for a moment then looking back at the priest as if steeling himself for rejection. 

"Yeah, your fellow priests were always very clear on the 'hell' part. On account of all the sleeping around with men, you know? Really bad for my eternal soul or whatever." He's staring at Kiel now, face hard and brittle underneath- the very picture of someone expecting rejection but still hanging onto a little sliver of hope.