Do guys not care if they hurt a girl's feelings?

i notice a lot of times guys say things that will hurt a girl's feelings but don't seem to notice or care. today I was hanging out with a group of friends and one guy said, "hey sara, I saw a girl today who looked just like you, except she was hot and had huge t*ts" and then switched to talking about video games without even noticing that it made Sara sad. one time in college I did badly on an exam and was upset about it and a guy told me that's why girls shouldn't be in college, because we're too stupid to succeed. things like this happen to me and my girl friends all the time, and I'm wondering if guys don't notice or just don't care.
Do guys not care if they hurt a girl's feelings?
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