Jojo,
Regarding your first question:
jojo4017 said:
Why do some guys get a huge thrill out of fucking another man's wife, such that they seem to seek out only married women?
Many years ago, at a time when I was single, had moved to a different town, and had also ended my relationship of a couple of years (roughly) with my lover, I went out cruising the bars with a new male acquaintance looking for a woman. He too was single and wanted to find a woman.
In one of the bars, I saw an attractive woman who was having a beer with a female friend. I was slightly acquainted with her — not well, by any means — because she worked in the organization where I had accepted a job. I knew she was married.
I immediately interpreted her presence in the bar without her husband as meaning she was "looking." My male acquaintance and I introduced ourselves and joined them. After talking, we went to another bar that featured dancing and a live band and danced far into the night. I'll skip the details, except to say I "beat my acquaintance out" for her affections. Soon hereafter (not that night), we spent about half a night making passionate love in her marital bed. She told me she had separated from her husband because he was having an affair with another woman. Soon thereafter, she mentioned her husband was living upstairs in the same house(!), which she owned.
So, I cuckolded my new woman friend's husband. This was the beginning of a passionate affair that lasted ~1 yr +. (Not long after we began sleeping together, she divorced her husband.)
I was not attracted to her initially because I knew she was married. Rather, I was attracted to her because I was single, lonely, I wanted a woman to sleep with, and I found her *very* sexy and attractive. She was also very intelligent and interesting to talk with. I liked her. A lot.
My wanting to take my married woman to bed, as I did, was unrelated to her being married. I regarded that as an undesirable and, potentially, somewhat risky complication. But I wanted her badly.
So, that's how and why it happened.
This could be translated into a short answer to your question by saying: the most desirable and attractive women tend to be married (unless they're between marriages), and a married woman drinking by herself or with a woman friend in a bar is generally interpreted as meaning she's available.
Regarding your second question:
jojo4017 said:
And why do I want this type of man to get my wife?
I don't know. I think you'll have to answer this question for yourself. While doing so, you might keep in mind that fulfilling your fantasy could result in losing your wife.
—Custer