Many of them are not even eager to cheat on their soulmate - instead, it would be enough to at least periodically watch jerking fuck vids with a non-trivial, constantly changing plot.
Even truly favorite things and hobbies can get bored if there are too many of them in life, so you should not blame the representatives of the baretwinks fuck tube for trying to avoid routine.
They say that all men are pretty often womanizers, but if you dig deeper, it turns out that they just want some variety in swap sex porn.
