Bobbie's always telling the Professor to hush up! I wonder if Bobbie means talking ruins everything in general, or when the Professor in particular talks, he ruins everything. She'll probably mean it more specifically when he comes out with his whole "I can't smooch a married woman, no matter how crappy the marriage is" bit, which must be coming any day now. Right, Professor? Right?? Don't make me question everything I think I know about you.