an.1.11 Aṅguttara Nikāya (Numbered Discourses)

The Chapter on Giving Up the Hindrances

11
“Mendicants, I do not see a single thing that gives rise to sensual desire, or, when it has arisen, makes it increase and grow like the feature of beauty.
When you attend improperly to the feature of beauty, sensual desire arises, and once arisen it increases and grows.”