These are good points. I have thought of other women in my past while dating someone but it wasn’t because I wanted to get back with them. I think our brains just seek out scarcity. So over time we take what we have for granted. Because as soon as my current gf becomes my ex, I’ll be thinking about her when I’m with the next girl lol
I also remember thinking about crushes I had in the past while I was with my first gf. So I was even thinking about other women that I never had sex with. I don’t think sex is the issue. We’re just wired this way. Kinda like how someone that earns a million dollars immediately wants to earn another million.
Also, my relationship with my first gf that I loved very much couldn’t have gone anywhere because I was always curious what other options were out there. I never even had sex with her. You can’t really know what you want or who is good for you without exploring. And you can’t learn the important lesson that people wear masks in the early dating stage without exploring multiple people.