No more wondering how your Sim's pants can defy gravity without a belt or strong elastic. The Slightly Altered Muscular Male Mesh Mod (SAMMMM) is exactly what it says - an alteration of Maxis' nude male top mesh for Male Adults, young adults and teens that changes a few vertexes in the body to give it a slightly more curvaceous shape instead of the near-cylindrical default Maxis torso.