Shampoo & Conditioner

I was wondering if this ever happens to you.... here's the thing...... About once every month or two, i will be taking a shower putting the conditioner in my hair and as i'm working it in, i think "wait, did i put in the shampoo yet?" and then, i can't remember so i have to wash my hair all over again. does this ever happen to you or am i the only one?