This requires multiple partners. During anal intercourse, the male will ejaculate into a condom, proceed to pull out, while leaving the condom in the girls anal cavity, before having his friend place his penis inside the same condom that resides in the females anal cavity and continue to have intercourse
Male 1: You want in on this?
Male 2: I would, but I don't have a condom
Male 1: Don't trip, just pull a Jalapeno Popper and you'll be good