Mm-hm - see my note below about Jack being more wary of dying... Not that that's really likely to stop him if he gets into things enough!
His mind was also going places like the possibility of popping Spike's gay cherry of course, but that's mostly just his little fantasy. He knows Ianto's going to get there first, and once he gets where Spike is for this he'll know it's off the table anyway! :-)