The over-the-hill theme is a staple on the birthday party scene, typically for landmark dates like the 40th and 50th celebrations. While it may be a popular choice for some, for others, it may not be the best idea. Transitioning from one decade to the next is a tough time for many people, and if you poke fun of and highlight this, you could wind you up with egg on your face. If you insist on throwing a party with walkers, AARP forms and dentures on the table, then make sure you know that your birthday boy or girl will take it with tongue in cheek. Actually, maybe it's best to avoid for women in all cases. No lady needs the public reminder that she's officially at cougar status.