Men demand access to women anywhere, anytime, and anyplace.
They see it as their RIGHT as men to be able to demand her time, attention, and respect.
The notion that a woman they are attracted to should be allowed to exist without dealing with their advances is viewed as an affront to their manhood.
After all, it is her obligation as an attractive woman to give every guy who gets a boner at her the time of day. If she didn't want to deal with their advances, she shouldn't have existed in public and looked attractive.
It's why I'm still convinced the Block button is the biggest advance in Feminism in the last 25 years. For the first time, women can exist and socialize in public mixed gender spaces, and even if a man wants her attention, she can say No, and actually enforce the boundaries without any risk to her safety.
EDIT: And no, I'm not going to give y'all any "not all men" cover here. Try that one on me, and my block list will gain another line.