This is just a little less scary than the how to survive prison manual.
If the outer part of his sheath is really grungy you will feel little clods and nubblies of smegma peeling off as you grope around in there. Patiently and gently expedite their removal.
5) Thus far, you have probably only been in the outer part of the sheath. The Part Itself, you’ll have noticed, is strangely absent. That’s because it has retired shyly to its inner chambers. Roll up them thar sleeves and follow in after it.