Latex shorts with penis sheath

With permission from my queen she allowed me to buy these. https://www.lovehoney.com/product.cfm?p=18990

a few of the reasons I wanted to get them was because I love latex, my mistress loves to see my ass in very tight shorts and lastly I like the idea of the penis sheath because it's going to be a thicker rubber and we could use them for PIV sex or some sort of teasing. I'd assume I'd have a lot less feeling, plus I could put a condom on or a desensitizer to help numb things even further. I was thinking they could be an aid to longer lasting PIV (whenever that will be). Anyone have any experience with latex penis sheaths?