Akela, that’s what we call a loner or a lonely man in Hindi. It’s a different thing that A Kela in Hinglish might also mean A Banana, anyways jokes apart what I was trying to emphasize here was on loneliness.
Loneliness is less prevalent in Bachelors as compared to married people as Bachelors are always in company of their friends, not that married people are not but then married people in Metro spend more time with themselves as compared to the time they spend with their spouses, which is also one odd reason for adultery and at times reason for long lasting marriage (coz both get their much needed Space).
I have often observed that people in general spends too much of time alone while commuting to work, while travelling on work assignments, etc. & when I am alone I either spend my time reading, thinking or observing different people and while observing different people there are many memories and emotions that unfold.
These observations are the ones that bring in mood swings or take you for a ride into memory lane. I have been lonely many a times and have indulged in the observation game time and again. The observation habit is the one which has helped me to grow as a person, to know more about human behavior, has helped me to increase virtue of patience, has definitely made me a better human being, has made me more sensitive towards people (although my wife would not agree to all I mentioned above, she says I still belong to Neanderthal age :D).