A man inserts his penis into a woman's anus and then stimulates her nipples so that they begin to lactate. After the lactation begins, he then walks her around "pumping" her (like a can of bug spray) while squirting her breast milk around the room (like bug spray).
"Dude, what are all these weird stains on everything?"
"Oh, sorry about that, me and Allisen were doing the Bangkok Bug-Spray and got breast milk on everything. It won't come out"