Is lemon rind supposed to feel sticky when being grated? I was grating lemon rind for a lemon cake and noticed that it left a sort of sticky film on my hand. Is this normal or does it suggest that the lemon was not fresh? 

My other question was about whether or not the lemon I used was spoiled, so perhaps the stickiness caused by the lemon was due to this.
Limonene, a major component of lemon oil, is not very water soluble, and will leave a sticky residue on your hands til you wash with soap and water.