A submissive neural implant makes no distinction between pleasure and pain it just receives impulses directly from the spine and transmits them to the dominant unit. A dominant unit can receive signals from more than one submissive unit which are then relayed directly into the brain of the dominant unit host. An interesting side effect of using neural relay technology between clones is the triggering of shared mental images, it's not telepathy (just something to do with identical brains interpreting signals the same way) but it's something close. I had my dominant implant fitted when they stared growing my clones. On a pain scale I would say it's similar to having your nipples pierced but it takes much less time to heal. The neural transmission system only works over short distances (unless you buy the deluxe package and subscribe to the remote relay service) and other than a brief test when it was fitted I didn't feel it working until my clones arrived.
I knew the postman was about to ring on the door bell because I could feel my clones excitement tangibly in my stomach. As soon as I had managed to open the boxes and fight my way through all the packaging I knew my plans for the rest of the day were a write off. You know what it's like when you get a new toy delivered and you just can't wait to play with it, besides I had already had a couple of squeezes of my Arbrathian Joy Hamster and I was feeling kind of mellow yet frisky. I had ordered a pair of clones and even just looking at them gave me a tingle in my knickers.