Loss of sensitivity is often due to peripheral nerve damage in the penis, so this could be something that has happened to you; it can be caused by a number of things, ranging from serious trauma to the penis to just too much rough handling over time. One excellent option is to start using a top notch penis nutrient cream (health professionals recommend Man1 Man Oil) that includes an ingredient called acetyl L carnitine. This ingredient is neuroprotective and can help to restore sensitivity lost due to peripheral nerve damage. Good luck!
Hi dude, I've been facing a similar problem, check out my post. After I did a 'liver flush' I had a bowel obstruction for a couple of days and the morning after my penis really was shrunken up. For months my ***** were afwull, now they're normal again and my penis isn't as stressed anymore. It's now just way smaller, bloodless and weightless when calm and it's way harder to get and stay erect, to enjoy sex and I come quicker too :/