Why couldn't Rachel be a little more specific about the type of person she was? Goodness knew; if she were a hippie I'd talk to her about her drug experiences, the zodiac, tarot cards. If she were left-wing I'd look miserable, hate Greece, and eat baked beans straight from the tin. If she were the sporty type I'd play her at... chess and backgammon and things.
Sex is hard to write about because you lose the universal and succumb to the particular. We all have our different favorites. sex is impossible to write about. Lawrence and Updike have given it their all, and the result is still uneasy and unsure. It may be that good sex is something fiction just can't do--like dreams. Most of the sex in my novels is absolutely disastrous. Sex can be funny, but not very sexy.