I now find that one of the most awkward feelings (to me) is the unsettling silence that accompanies a make-out session between two people.
What I wonder is if it's just the occurrence that causes the reaction or if the main factor is the people involved. The awkwardness definitely seems to be higher if it's concerning someone I know. Not to mention that your proximity to the sucking-faceathon is inversely related to the level of discomfort; the shorter the distance, the higher the awkward.
And the funniest part is that the two people involved are usually just fine; they're like the eye of some weird storm comprised of awkward silences riddled with soft whispers O.O