That is indeed very sexy indeed.

Not something I have done with my wife before, but I am certainly going to give it a go after reading what you wrote!

When I say not something we have done before, I mean not with her hair flowing off the side of the bed that is. What I have done with her, in the missionary position, is to lay her hair over the pillow that she is resting on, and since her hair is long enough, past the edge of the pillow and on to the bed. This means we have to move a bit further down the bed. So hair over the side of the bed is certainly a variation to try.

The more I think of it, the more I like it. I suppose this is kinda what you mean?