Can't say I have watched all these, but I've known Christian sex therapist Douglas Rosenau pretty well, and almost always recommend his book, Celebration of Sex, as the best Evangelical work on sexuality in marriage I know of. (Rosenau in turn included a bit of my old Cornerstone review of Celebration on its back cover.)
So get to the punch line, already! Okay, here's some introductory bits of free sex therapy on line from Doug and others. Some of it is quite frank, so be advised that it may not be suitable for younger internet users. A good resource for marrieds, engaged couples with lots of questions, and for singles who -- frankly -- wonder about sexual issues in a very confusing culture.
And one potential caveat: I cannot vouch for everything on this site, or even for every video in the long list. As a Christian egalitarian (a.k.a., biblical feminist) I'm always nervous recommending Christian marriage sites of any kind, as the hierarchalist viewpoint is so over-represented on such sites. Not saying this one is... but proceed with caution.
