Too funny! One of the women I work with had it done last year, and since her birthday was right after she came back to work, we gave her cards with the them of aging and leaky bladders. You could look at those type of cards (In the funny birthday section) for inspiration. HTH
What about one of the Operation cakes - I just love them! Tailor it toward a bladder being operated on:
http://cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1674957
http://cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1294524
A diaper cake but make the brand Depends:
http://cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1455176
What about a cake with a diaper in the middle and the big red circle and line going through it like a no smoking sign - get it, no diapers?
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