Fill her up!

I stop at the same gas station almost on a daily basis to purchase gasoline. I got into an OCD habit recently where I use the gasoline pump number and apply dollar amounts to match that number. Let's say if I stop at pump 7 then I will get $7 of gasoline. Well the cashier was teasing me about this habit of mine a few days ago so today I went to the counter and flopped my bank card down and said "You know the routine!" Today I was on pump 8 so he says "$8 on 8 huh?" and I said "Yep!" and he started to giggle and he said "I would hate to see what would happen if we had only four pumps here!" Then we were both giggling.