I'm uncut (being a Brit). I'm fortunate in that I can "lodge" my foreskin behind my glans and it doesn't slip back over (many who have viewed it in such a state consider me to be circumcised until they have a closer examination - which is yummy in itself). I decided to perform an experiment and have not covered my glans with my foreskin for almost three weeks (apart from when showering/cleansing). My glans has become as hard as a nut and taken on the appearance of a horse-chestnut (the conker inside - not the spikey outer layer - :biggrin1. What's concerning, though, is the lack of sensitivity. I can bang the thing against a table with no feeling (apart from knowing it's been banged against a table) and I can also have my partner lick and suck it for all they're worth, but it don't jump and bounce around like it used to. It's almost like my glans has died. Gonna have to curtail my experiment pretty soon thru fear of it becoming permanent.