He wanted a recommendation, but got very quiet when I said, "That depends on what you want it to do." Although I was eager to advise him further, he dropped the conversation at that point. We're good buds, but I guess I hit his shy spot.
So I'll tell you instead. There are masturbation devices (AKA "sleeves" or "strokers") that simulate the feel of a vagina or other receptive body part, penis pumps, cock rings, penis extenders, anal toys/prostate stimulators, and more.
Two of my wonderful sex-toy affiliates, Good Vibrations and TabuToys, offer a wide array of sex toys for men.
Once you've settled on the type of toy you want, be sure to read customer reviews. Pleasurists.com is an amazing site that gathers sex-toy reviews every week and posts links. This week, for example, you'll find links to my reviews of the LELO Lily and the Fun Factory Delight, three reviews of penis toys, and dozens of other product reviews.
Pleasurists.com led me to a funny and enlightening review of the Tantus Stroker on Undressed Reviews. Joe wrote,
The internal ribs are too stiff and end up pummeling my penis as it goes in and out of the Stroker. The ridges are so tight and hard that they end up acting as squeegees that funnel all of the lube to the top and bottom of the Stroker. That adds chaffing to the previous pummeling. I was not pleased.