Which of the following areas on the body is normally as sensitive as our upper lip?

Explanation

The word 'kiss' comes from the Old English 'cyssan' which again derives from the early Germanic "kussijanan" or "kuss". This word is thought to be based on the sound made when kissing. Whilst the sense of sensitivity is individual, our lips are normally assumed to be as sensitive as our fingertips, and are one of our body's erogenous zones. When two people kiss, 2/3 will tip their head a little bit to the right.