Toxic, this is exactly why girls tell guys (like DIVISION) that nobody has ever rocked their world like that before
I think its good you dont lie to score and despite the fact it cant be easy to admit you realize exactly why you are bitter, which is the step 95% of the population never makes.
The next step is growing a pair and getting over it
Obviously, I can only go by her word, but considering the fact that she's told me things about her past (rape survivor) that she hasn't even revealed to her ex, nor her parents, I tend to think she trusted me more than the others.
That combined with the fact that I am a giver sexually, means that I doubt she'd lie about her ex or his sexual inadequacies.
You seem so jaded and pessimistic toward relationships and what they mean, which leads me to believe you were truly wounded by the men in your life.
The question is: Did they cheat because it was available or because you weren't satisfying them in some way? There's a reason, hidden beneath the lies and insecurity, though you may never get the truth from your ex's. Regardless of why they cheated, the fact that they did tells me your relationship was not as solid as it needed to be.
All men do not cheat, because all men don't look at sex as merely a transaction of flesh......
I think it's the men you've been dealing with that have tainted your perspective, not men in general.
No idea how old you are, but you sound late thirties to mid forties based on your level of pessimism.
DIV