Place it near the end of a gross-out compilation, after Fart With Reverb and just before Bruh, so the crude gag peaks before a deadpan reaction closes the sequence and leaves that reaction as the last beat.
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Mastu Smegma 4 is a 19-second meme clip built around its deliberately crude title, played as a short shock joke rather than a line or a song. It lands with a gross, uncomfortable laugh, the kind that works best when everyone already knows the joke is in poor taste.