My Day Yesterday (Dear Facebook)

Random story... this lady was in my office yesterday and her name was for example “Jane D. Doe”. She was signing a document and I said “ma’am I’m not sure how the wording is listed, so please just sign your first and last name and I can slide a D in there if need be” ... then I realized I just told a woman “I can slide a D in if need be” and literally got so tickled I could barely control myself...I was shaking trying not to laugh... she just looked at me awkwardly... that was my day