All this was funny until she did the same thing to me.

Because she doesn't believe me, and as per her request, here is a excerpt from the Rulebook of Boyfriends:

Rule #523
The Boyfriend reserves the right to poke, tickle or tease the Girlfriend. This is the divine right of the Boyfriend and serves to keep the Girlfriend on her toes.
Example:
Her: Why you tickle me?!
Him; Because i'm your boyfriend.

Rule #524
The Boyfriend reserves the right to laugh at the Girlfriend. This is to show how comfortable the Boyfriend is, in the relationship.
Example:
Her: You're laughing at me!
Him; Yarh.

Rule #525
The Boyfriend shall agree with the Girlfriend, subject to the topic of discussion. This is to show the support and love of the Boyfriend.
Example:
Her: My bedroom is in a mess.
Him: I agree.

Rule #526
The Boyfriend shall always pay compliments to the Girlfriend. This is to show how much the Boyfriend loves the Girlfriend.
Example:
Her: I look fat in this dress.
Him: Your eyesight is damn good.

Rule #527
Should the Boyfriend find her behavior unbecoming, he shall advise the Girlfriend on what to do. This to ensure that a resemblance of manners exist, even at home.
Example:
After eating dinner...
Her: *burp*
Him: What are you suppose to say?
Her: Excuse me.
Him: Good girl.

All rules and regulations are made with the consultation and agreement of the Boy-Friends Federation, Singapore (BFFs). The BFFs reserves the right to change, alter, add or void the rules and regulations stipulated in this book. In addition, the BFFs reserves the right to have the final say in any matter. Any objections, arguments or criticism from the opposite gender shall not be entertained, discussed, or approved.