1. Perform your secret handshake in public.
2. Say it with your most classic jumping pic.
3. Get matching tattoos.
Get something meaningful because it will last FOREVER.
4. Let them know you're actually there when you're "invisible."
5. Humor them with a DOUBLE Slip 'N Slide.
6. OR, if you're feeling more extreme, take them tandem skydiving.
A true bonding experience.
7. Get them a pair of bestie pets.
8. Or better yet, a pet PIG.
9. Wear matching spectacles so you have similar views.