Let me tell you, if you've never done it, kissing someone who you have no feelings for whatsoever and aren't even really attracted to is super weird. The presence of a director telling you precisely what to do while you're lip-locked actually makes things slightly less weird, but it's still weird. It's got me thinking about how weird the activity of kissing is in the first place. I mean, the pure mechanical activity is to smoosh your lips against someone else's for an indeterminate amount of time. Then sometimes you say "you know what, this lip-smooshing isn't enough for me. I'm going to shove my tongue in this mouth and smoosh our tongues together!" I mean, really. Weird. When we get invaded by aliens, you try explaining it to them, because I've given up.