Yes. Take your birthday present to your bedroom and unwrap her.

You obviously can't wait, saying "Yes!" take me by the wrist and lead me toward your bedroom saying teasingly, "I wonder what it could be." I giggle as you drag me along. I beckon your wife to come along, saying, "Come on! You want to be there when he opens his present, don't you?!" She smiles and follows us in.

Your wife takes a seat on the edge of the bed, while I stand in the middle of the room. As you anxiously reach for my dress, I give your hand a little slap and say, "You know, one of the things that make me special is that this present can unwrap itself." I bite my lip suggestively and add, "Unless, of course, you want the pleasure of tearing off the wrapping yourself."