Trust | Jealousy
Two words, and probably jointly responsible for more relationship break-ups than anything else.
If you see these early in a relationship, take them as a warning that things may get worse.
My wifey is fine with me (is she behind me? ), I can say other women are pretty and live . Jealous girls need to realise that men DO NOT suddenly find every other woman on the planet ugly just becuase they have you. What you do have that they don't is looks AND inner qualities.
Note: If you watch porn make it very clear to the woman that when the camera cuts..... the guy is actually having a break and doesn't do it non-stop for 2 hours .... great business.... supplying Lube to the porn industry.....
If you think your other half is behind your back, then even if they are not (and in most cases they aren't) then they may as well as they are getting blamed for it anyway!
I'm sure others have plenty to add to this