For some reason I'm having a difficult time understanding the reason why air 'feels' cold when you tighten your lips and blow air from your body, yet it 'feels' hot as you exhale with a widened mouth. Why is this so? The only reason why I'm having considerable difficulty is because I keep thinking of the motions of the molecules. If they are moving fast, the air should be hot right? I am a layman, and this question may seem simple, but I want to understand in detail as to why this is happening. Is this particular phenomena similar to wind or a breeze? And how it feels cold? Can someone provide some insight on this? Thanks.