I always wear a watch, even in bed. Indeed, on those occasions when I've 'bared all' on a naturist beach, I've often still kept my watch on.
For a lot of my life, knowing the exact time has been important to me. For example, during my teens I was into short wave listening, submitting reception reports to both commercial radio stations and radio amateurs from across the world; it was important that I recorded the times accurately. Also, during my third year at grammar school, I was the school bell ringer (no automation in those days!), who was required to press the button to ring the school bell at the start and end of every lesson. (I prided myself on never being more than a second or two wrong with my actions).
In later years, I've run a railway station, where even a few seconds delay in despatching a train at the right time was seen as being unacceptable. I've also worked on traffic surveys where, for example, I've been required to note down the
exact[i times (to the nearest second) at which traffic lights have changed or railway crossing barriers have come down. So knowing the right time has always been very important to me. (My wristwatch is always either right to the nearest second or, if it's not, I'll know how exactly many seconds fast or slow it is). These days I simply find that it's a lot easier to glance at my wrist than it is, for example, to dig into my pocket for my mobile phone.
Further, while I'm definitely not 'into fashion' in general, I just love watches as a fashion statement. If I ever get a [i]really] big lottery win, I doubt that I'll buy a flashy car or an imposing mansion but I'll DEFINITELY buy a Patek Philippe Grand Complication watch, such as this little beauty
https://www.mappinandwebb.com/Patek-Philippe-Grand-Complication-6102P+001/p/17920689 , and probably about a dozen other similar watches too!