@Mikezumi - In one of my games, I changed the look of one of my Sims and his wife divorced him. I made a thread about it (I'll see if I can find the link). In another of my games, my Sim couldn't get a date until I physically altered him. I also made a thread about that one. In the latter, I had remembered one of the producers had mentioned that Sims can 'see' each other and this (can) affect how they interact with them.
Here They Are:
I Changed Their Looks And Ruined His Life!:
https://forums.thesims.com/en_US/discussion/877981/i-changed-their-looks-and-ruined-his-life#latest
My Sim Needs A Woman and I Need Help!
https://forums.thesims.com/en_US/discussion/936619/my-sim-needs-a-woman-and-i-need-help#latest