Climaxing into the Anus after rough sex or infection. When the contents are extracted, the confirmation of a Neopolitan Pie would be the colours of Cream/Semen, Brown/Excrement, and Red/Blood
After climax into the Anus:

Girl: Argh my arse is killing me. I am going to push it out
Boy: Oh, it looks like I've given you a Neopolitan Pie
by Bigus Dickus Dilly Dilly November 27, 2019
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