Talk That Talk is NOT a sex album. Is about the limits between love and sex, the codependecy, the perpetual search for love and the filling of that void with meaningless sex.
I haven't heard ''Vespertine'', which is a shame since I'd love to get into Björk. But both ''Erotica'' and ''The Velvet Rope'' (although the second is one of Janet's less sex-oriented albums) are some of my favourite albums and they're both utterly superior to ''Talk That Talk'' anyway.