The biggest turn off is someone who is not with you in the "here and now". What I mean by that is talking incessantly about the most inane and random crap. I was with someone once who would not quit yacking. I know there has to be some form of communication in the bed room but do you have to talk from start to finish about the tea in China.

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Deep into that darkness peering,
long I stood there, wondering, fearing,
Doubting, dreaming dreams
no mortal ever dreamed before.