If you're lucky, you'll only get me talking about glacial surficial geology
I think part of the point here is going over people's heads. She used her hyperfixation to confuse and bore the man to deflect any opportunity for him to flirt with her or ask her out until she was able to leave.
Everyone saying "jokes on you, this bus girl is so my type" would also have their ear talked off and never given the opportunity to ask her out.