I know the example provided by Vische was about a guy on that point I'd say sometimes the cost of marriage may be an issue, but if you turned of the

for a while you may quickly identify the nature of the love.
I was with my ex (un married) for 10 years, I wanted to marry but she didn't because over the last 5 years she became very successful, wealthy and saw what happened to me in my divorce. She didn't want to risk losing it to me if we split.
So we split or I decided I needed someone who would love and care for me as I would for them... I met Rina.
So it isn't just guys it's a bit of human nature, and it's definitely fear...