Why would this scenario be creepy?

I used to have a calculus professor, but he was actually a physicist. It turns out he also had a BA degree in nutrition. I asked him why also nutrition (because they are so different). He said a basic nutrition course met one of his required general education courses. He met a girl to study with for the semester. It also turns out that she was a nutrition major. He really liked her, but he didn't have the nerve to tell her. So he kept taking nutrition courses so he could study with her. So he had to double major! The last year of undergrad, he finally worked up the nerve to tell her. This girl is now his wife. They are in their 60's now.

Most of my female friends say,"eww, creepy!" When I tell them this story.

A few have said it's cute, but just a little cute.

This is the type of scenario you would see in a popular romantic movie. So, then why is it creepy to so many women?