I am not convinced that there will be many men who have not seen the darker side of 'men' in their lives - workplace, friends, acquaintances and even themselves. I too would doubt any man who said - "Never me or my friends"
From my own life I can point to:
Having three ex girlfriends who had been raped before I met them (one as a 14 yr old in a 'stranger rape', the other two by someone they were on a date with or who was their partner - one answered "well it wasn't rape really" when I mentioned to her that it might have been)
A female friend when we were teenagers whose boyfriend said he would dump her if she did not sleep with him, he then proceeded to offer to share her with friends when she relented (against my advice)
Laughing when a girlfriend once showed concern because I may have 'blue balls' like her ex who suffered from it regularly 
Flattening a boyfriend of my sister's who said some pretty foul things about her to his friends which she (and then I) then found out about. His defence was it was banter!
Receiving an 11:30 pm call from an employee in tears because my then business partner had offered a 'financial arrangement' to her.
In my previous professional capacity I met both men and women who had been in abusive relationships - more women than men. (Mine was not a legal or healthcare capacity but one in which the relationship was quite close and the high level information was often pertinent)
In my first job out of University I was one of 4 men in an office of 30+ women. Their views and experiences of certain things were very clear to me. In that job, it was more often the women who were promoted but, in the end, I was moved to a different department to a higher grade than my then female manager and even I found that uncomfortable - even though I was brilliant
(this was the same female manager who used to 'tease' a male friend and I about our 'tomcatting ways' wanting all the details and patted me on the bum a couple of times though
)
Did I always treat my girlfriends correctly? No
Did all my girlfriends always treat me correctly? No
Have I been the perfect husband? By no means
Have I sulked due to my wife rejecting my advances? Yes.
Has she ever used the words "I'm not you mother!"? Yes
My main concern with this thread is that it is soooo black and white at times (as MN often is) and, more often than not, the demographics of the site membership mean that there is a danger of 'men' in general being seen as the enemy because anything they do wrong is due to privilege, cold calculation and misogyny.
Truth is, I do think men and women are growing apart in society. Both have their part to play in the reasons and solution for this.
Most men want a true partnership as much as the women in their lives do. I just don't think we're very good at explaining to each other how we define what that is and accepting each other's 'red lines'.
back to my cave now to go and play on FIFA before doing a cursory bit of hoovering before the wife gets home - I'll make sure to put the dishes next to the dishwasher 