Often

Have you ever laughed until you peed your pants?

no

Have you ever climbed on a tree?

yes

have you ever had tshirts that change color in the sun?

No

Have you ever laughed so hard whatever you were drinking came out your nose?

:| no

Have you ever been cheated?

No

Have you ever seen a ballet performance?

yes, and i've never recovered.

have you ever had a fish nip your feet in the ocean?

Nope.

Have you ever had to help somebody from drowning? :|

No, but i myself needed help once when i was a little kid.

Have you ever fantasized about giving away all your possessions, moving to another country, and taking on a new identity?

hhhmmm at times minus the identity part

Have you ever thought about never getting married?

Yeah for sure. I'm actually really against marriage, personally

(^Alliteration)

Have you ever had frostbite?

no!!! thank God

Have you ever wondered what your life would be like if you had a different name?

No

Have you ever had sex in the plane?

NO :|

have you ever looked at someone on the plane and couldn't take your eyes of him/her ?

Yes but not on the plane

Have you ever picked up the dog poo?

no

have you ever bought something you still regret that you bought it ?

many

Have you ever seen any of your net friends?

yes

have you ever saved someone's life ?

No

Have you ever wanted to do something over?

Yes

Have you ever walked into a mirror in a mirror house (amusement park)?