Science is based upon, or at least it should be, on quantifiable observation that has the mechanics of being disproven.   So when it comes to the Theory of Gifting it can be hard, from a scientific point of view to give it credence.  That being said, watches are a great gift.  This theory is based up0n observable behavior of people buying watches as gifts.  Among the popular watches are Invicta, Pulsar & DKNY, but there are many more popular watches like Swatch, Croton and Kenneth Cole.  So as theory of gifting continues to be debated we can be certain, as much as possible, that watches are on the top of the gifting list.  I think.