You know they've got showers for that.

[ Blatantly making fun at his goo-covered expense, though he really has no right to be. Nathan spent a good four hours in crusty goo before he got cleaned up. But what starts out as open mockery shifts quickly to a thoughtful, only slightly disturbed non-answer to his questions. ]

Hang on, if it is alien ejaculate, do you s'pose it's like in Aliens and they've impregnated us through our mouths?