THE SIZE OF A P

Jackson always puts way to much tooth paste on his tooth brush so I showed him how much he was allowed.  I told him he could have the size of a pea.  That was over a month ago.  Yesterday as he was getting ready to brush his teeth I told him to only put on the size of a pea.  He said "how about the size of an A or maybe a B".  This whole time he thought I was talking about the letter P, when really I was taking about the vegetable pea. We don't eat peas very often.  I guess we better start =)