There are several places where you can buy funny adult gifts. Some popular options include:

1. Online retailers: Websites like Amazon, Spencer’s, and Etsy have a wide variety of funny adult gifts available for purchase.

2. Specialty stores: Look for shops that specialize in novelty items or adult-oriented humor. These stores often carry a range of funny gifts.

3. Party supply stores: Many party supply stores sell humorous adult-themed gifts and gag items.

4. Gift shops: Some gift shops, especially those in tourist areas or near comedy clubs, may have a selection of funny adult gifts available.

5. Adult stores: Adult-oriented shops often have humorous and novelty items in addition to their other products.

Remember to consider the recipient’s sense of humor and personal boundaries when purchasing these types of gifts.