Other reason - Chance. In my case a grandma (in relationship) said that she would like a particular girl to marry me saying that she looks like 'Delilah' (Hedy Lamarr). I was around 13 at that time, and that got registered in my brain. Years later my future father-in-law attended my sacred thread ceremony and knowing this, I very nicely offered him refreshments (no, I had not seen the girl/my future wife). I think he too was observing me as a future candidate as the husband of his daughter. Well, the years passed by, studies and job, and then I wanted to get married. I suggested to my aunt that this girl might be the one for me. Relatives arranged a meet/look for us, she was blushing red up to her ears, and I accepted the match. My aunt went to her family, made the proposal, and it was accepted by my wife's family. No, she was not like Hedy Lamarr, did have curly hair but no blue eyes.
So, a talk in around 1955 and the marriage in 1967.