My only viewpoint is from my mother who painted sex in a really bad light, that it was only for conception, and anything else was full of guilt and shame.
Well, the older secretary seemed to be of that particular mind-set. Even talking about how no self-respecting woman could hold her head up in church after dealing with sex all week. For as far as we've come regarding women's sexuality (and we have) we still have far to go. Virginia may be far more liberal in regards to her sexual wants than some but she still got called a whore for liking and doing things that Ethan hadn't even considered and it affected her too. Masters suggesting that they have sex was after Ethan called her a whore was horrible timing. She may have still reacted uncertainly to it but after the whole 'wear the white coat, play at being a doctor, but you're nothing but a whore' it just exacerbated a deeply unpleasant situation. Not to mention the commentary about how she was flirting with blonde doctor before they started the couples observation.
I'm in this. I love Michael Sheen anyway (I love it when he goes on Craig Ferguson's show -- hope he does for this series) and he's got that Total Scientist Vibe down pat. The only time we saw him legitimately be passionate was when he was talking about how everyone participates in sex but no one understands it... also when he was talking about the women that he saw in his practice, ravaged and wounded and how he doesn't know how to talk to them or help them but to say 'get a divorce, or cheat.' Meanwhile, there's the stuff going on with his wife and their inability to conceive. There are some fascinating dichotomies there.
The only thing I didn't like was Masters' wife calling him 'Daddy' all the time. Guh. Hate. I know that's a long-standing thing, especially back then (Hell, there are songs, sung by women, about 'Daddy' and ewwwwww!) but, to me, that is one of the most unsexy things to say to a lover or a husband. Yick. All that being said, I do wonder about Libby and how the inevitable failure of that marriage will be portrayed.