There is no definitive guidebook on how to pick the right partner, and even if there were, I'm way too dumb to write it.
One time I went into a restroom and a girl followed me in. I signed an autograph for her in the sink. It was pretty funny because she was in a guy's restroom and she wasn't embarrassed at all.
To consult the statistician after an experiment is finished is often merely to ask him to conduct a post mortem examination. He can perhaps say what the experiment died of.