And Harry Kim is like the Anti Christ of all things sexual.. not only does he screw up(and no pun intended there) his own chances, but his mere presence destroys all sexual energy in the room. Like Janeway's almost kiss with that French alien previously mentioned. Just call him Ensign Cockblock.
See I think Kes drains all the sexual energy from the room with her scary borderline child vibe and her is she or isn't she Neelix questions. You wouldn't even know if it was appropriate to make the mildest of lewd jests around her.