The Male G-Spot Stimulator. The best-selling Aneros Helix is part of the Next-Generation line which includes the Maximus and Eupho. The Helix is aggressively shaped and angled, providing immediate pressure and tension on the prostate and surrounding area. The Male G-Spot Stimulator. It requires less patience and practice to realize benefits.The Aneros MGX sizes are 3 3/4" shaft length with a 3 1/4" diameter. Overall length is 4 1/8" from the base of handle to top of shaft. The Male G-Spot Stimulator.