Unless you look like a movie star (or your girl seems to be under the impression that you do) or are actually a professional male stripper, you probably shouldn't go for the over-the-top sexy thing.
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Most guys actually end up feeling pretty comfortable with the romantically sexy approach. The trick is to not make the whole affair seem staged or awkward. Let it be a natural part of foreplay. You've put some music on before going to town before, right? This is no different. Time is on your side so take plenty of it. Nothing turns a girl on more than romance, and if you want the hottest sex of your life, you've got to pay your dues and restrain yourself for a while.
Do the opposite of what you normally do -- wait it out. Instead of preparing to pounce, put on some music, undress slowly, move with the music (but don't hurt yourself), spend a lot of time touching and kissing her body, and then cap it off by nibbling her earlobe and whispering the most romantic thing you can come up with.