Sounds like 50 Shades of Grey? That was unwatchable - I'd say there were several scenes that were awkward viewing. There are two scenes of spanking, and three scenes of masturbating (obviously you don't see the naughty bits, lol) - two featuring Maggie Gyllenhaal's character and one featuring James Spader's.
I wouldn't call Secretary unwatchable, just weird.
BTW - I've never seen Fifty Shades of Grey.