Was this mean or was I right in doing this?

So this happened last fall, this freshman on our dorm level asked me in a very shy timid voice if I would fart on his face! After laughing for like 20 minutes I asked him why on earth would he want me to do that!! He told me it was a dare from a fraternity he wanted to rush that he had to get a girl to fart on his face. I told him that my farts are particular foul and he should ask someone else. He kept persisting that I do so (probably cuz he knows im a tomboy and don't mind farting in front of anyone) So here is my question...I finally agreed to fart on this poor suckers face after warning him how bad it was going to be, he was frantically trying to push me off...but I feel that any job...even a repulsive one should be done right!!! So i held him there for like a minute so he got the FULL effect....was this mean?? After all he's the one who wanted to be farted on!!