For a rationalist approach to sex, I agree that "do scholarship, and just try stuff, recording the results in whatever way interferes least" will get you a long way. I've known of two instances where the following tidbits would have been useful in addition:

• Sometimes, but not always, make an honest attempt to figure out what your partner wants and do it. You'll probably want to limit that to activities that fit your own risk-taking preferences about pregnancy, disease, injury, legal problems, and so forth, but be sure to distinguish pragmatic limits from your habitual comfort zone and try to go outside the latter.

• Set up your living arrangements so sex is convenient. If you have roommates and feel inhibited around them, that's a problem.