I cannot find this sci-fi story that was published in an issue of OMNI magazine. It is in a time when humans can have any form they wish. It starts with a party of transhumans who invite their guests to pick a form for their child to be. And the shock of the party is that a woman submits a normal human form and it is considered rave, very cool — but not used. And it has to do with a male transhuman who becomes obsessed with this very hip woman-creature who would dare submit a human form. He is shocked and dismayed, heart-broken when she goes to Kathmandu and takes on this base human form. He gets over it until this wasp-combination laughs at him at a party — and he knows it is her.

I cannot get this story out of mind but I can't find the issue it was in. Please help. It was a great story.