For sure at least one in your life, you have encountered at least one pizza delivery man who is surprisingly and undoubtedly attractive. The idea is meeting a hot and attractive stranger is eventually enticed by you-the spontaneity of the plot is why people are into this kind of trope.
What is a more popular porn plot than a delivery man knocking on one's door to give the pizza which eventually leads to something more than what is ordered? This is probably one of the, if not the most, popular porn tropes ever! Straight or gay, whatever race or gender, pizza delivery porn is a constant go-to for a lot of people.