Some people do have larger foreheads than others, especially depending on ethnicity. 
I would say I have a strong forehead (and it fits my facial structure) and I'm primarily of western European descent. And, I certainly wouldn't call it a "leaning tower of forehead." My face would be way too round if I didn't have it.
I don't think human females in-game have too large foreheads at all (except some hairstyles do give the illusion of making it look larger).
I have a friend who complains about her prominent forehead, and my bf's claims he's cro magnon, but in real life, they both look fine/normal/natural/whatever. I think in real life people's features are natural, but in-game everything looks exaggerated and fake. It's the nature of the CC. These "attractive" characters are attractive in a way that does not mimic real life. Then, people make mods that make the characters even more unnaturally beautiful, like plastic doll skin with perfect make-up. Thus, when there is a slight "imperfection," my eyes are drawn to it immediately, and it's all I see.
But this whole thread though is about people's subjective perceptions of beauty. People obviously think differently. I know most people think humans in general are the best, but humans, especially females don't do it for me. It's the Miss Thedas Pageant of the BSN.