"An object at rest stays at rest and an object in motion stays in motion with the same speed & direction unless acted on by an external force". No, this is not going to be a blog on the Basic Sciences... I mentioned Newton's first law of motion only to highlight an interesting parallel between the inertia of physical objects and human behavior. The latter is difficult to measure, but all of us have come across umpteen situations where we have modified our natural behavior in response to an event. And mostly these are changes for the good... improved driving habits when cops/cameras are in the vicinity, hitting the gym few days before a health check-up, quarter-end scramble by sales people etc. are examples of these. In the mentioned situations, cops, health-check up, and limited time have taken the role of Newton's "external force".
Recently I was scanning my mail when I noticed solicitation from a reputed retailer trying to sell me a conditioner that promises "tangle-free hair". Now, even from a mile away one can make out that entangled hair should be the least of my worries. I scrolled down and surprisingly there was another mail from the same sender, but this time about some product promising to take me back to my "million-hair" days!