I read a good book recently by Daniel Pink called “Drive. The surprising truth about what motivates us”. I recommend it. But you don’t really need to read it as the principle is simple and I’ll give you a quick summary of the key messages for free.
Yesterday was the first day where a) it was sunny and b) the temperature squeezed to about 10 degrees. Which of course meant that everyone with a convertible HAD to put the roof of their car down (at least where I live).