Men need to know that if they're uncomfortable they don't have to have sex

Megan
We as women (me personally) have been told that it's ok to say no to guys pressuring us into sex (even when they threaten to leave etc) and if you haven't been told that in life you would probably tell your daughter to believe that.
There is a problem for men in this, society has basically established that all men want sex which isn't true. I've heard stories of men who were trying to save themselves for marriage or men who prefer to get to know a girl before they're comfortable with having sex with them and them just getting ignored by girls taking advantage of them while they're drunk.
My ex and the man I lost my virginity to (I took his as well) and one of the sweetest people I've known told me a while after we  broke up that he wasn't actually comfortable with having sex (I never knew or saw any signs of him being uncomfortable) and he said that he only did it because I wanted it. I feel bad for it and I want men to know that I (and probably a lot more women) care about whether they're comfortable or not. 
TL;DR: men also need to be told that it's ok to say no and the absence of this thought can be harmful to them.
This is mostly a vent but does anyone else have thoughts about this?

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