Do we all reuse cookware without washing if it's not "actually" dirty?

Example: If I use a pot simply to boil water, I will not wash it if I later plan to cook pasta in it. After pasta, I can't use it for hot water anymore, but if the timing's right, I'll use it for another serving of pasta, or even to make sauce. Since the pan just has starch and salt on it. Then I'll wash it. This is only when I'm alone; if the meal is for company, clean cookware only.

Is it just me, or "common sense"?

edit: should clarify that the pot in question gets rinsed between uses.