I got this from a book of homemade sex toys: Cut both ends out of a can, put a few tube socks inside of eachother (more socks = more tightness)...
It goes in 10 different directions, but yes.
Redtube is another good one.
Stretching, as was mentioned. You can probably find a "how-to" about it by googling.
Uncut. It's nice not to have to use lube to jerk off.
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