dancers know thier left from right, right?

ok so tonight after new community amy asked if i would rub her left shoulder because it was really bothering her...so i said ok (especially since she worked on my back last saturday or maybe it was the saturday before that anyhoo she helped bigtime) so im sitting there commenting on how tense she is and after about 2 minutes or maybe longer she turns to me and pointing to her shoulder says...
"this, is my left shoulder"
i start laughing as she turns back around because yes i am 26 years old, and a dance major mind you...and i STILL dont know my left from my right...i had spent the last 2+ minutes massaging the WRONG shoulder! no wonder i get lost in arboretums!
:)

:S