There was one scene that I remember from Big Love between the main character and one of his wives - I can't recall who initiated it, because it's really been a while, but the wife in question - Margene - was by far the one who knew the most about herself sexually and also the one who would have had no problem asking for something she enjoyed. Of course, that was HBO (and I guess they didn't think a show about secretly polygamous Mormons would really be watched by straight men scared of everything but strictly male-oriented heterosexual sex).