Academically Blonde

Overheard in a queue:

"My daughter Caroline's just started at University this week."

"How'd she get on?"

"Well she registered, and then that only took five minutes so she was sitting around twiddling her thumbs for most of the rest of the week. She says she's a bit worried about the other kids on her course."

"Hmmm?"

"She says they're all blondes. I said to her `But Caroline, you're blonde!' "