B12 shots

Anyone else have to get B12 shots??  I have to get mine once a month.  Today was great, because I had my two boys with me and they got to see me get my shot.  My 3 year old asked me if it hurt and I said no, you saw me get it and I didn't even move......he says, hmmmm, I think I like shots daddy.  Of course, I'm thinking, ya you say that now, wait until you have to get a shot.