I also suctioned it, applied pressure with fingers and performed oral sex. They said it was very pleasurable to be able to receive head and have the point of view visual that Jack creates. They give it a 9/10 and said that they are interested in seeing this develop in different shapes and sizes. With that being said we improvised and the toy wound up giving amazing results for my partner. Most FTM strokers we come across seem as if they are designed for trans masculine folks who are more developed growth wise physically. It worked best with reinforcement by hand. The first way, I used a nice amount of lube, opened the stroker and suctioned it and stroked. They are trans masculine and three years on testosterone. 'My partner and I used the Jack yesterday. Best packer I ever owned and I owned most of em.' -Jaki I tried after using a pump and it helped me stay erect. Promising reviews: 'I love this product! The hole is big enough for many sizes to fit and stay on with suction. The stroker cavity stretches and works best for anatomies at least 0.5' in diameter because it will create suction, any smaller and the suction will not be activated. For packing, it's recommended to be worn with a strap-on / harness, so that it stays put.