pain, though you can if you like. I poke gently. Gentle pokes can be very erotic to a man who is restrained to a bed and blindfolded. If you have him doing chores while naked, carrying a kabob skewer around to keep him busy can be fun. Poke him on the bottom to make him speed up or pay closer attention to what he is doing. You should try it, it is a lot of fun.
Clips & Clamps: I put clothespins on my list of things you should have. However, you can purchase many different types of clips as well as several styles of clamps. Clips are spring-loaded while clamps usually screw down in most cases. Some clamps have a slide that is used to tighten or loosen them. Basically, these can be used anywhere you can put them where they will stay in place. The advantage of clamps over clips is that you control the amount of pressure applied. Clips, on the other hand, are subject to the amount of tension applied by the spring. Some are fairly weak and can be left on for a good while, but you must be careful, they can cause damage to the tissue if left in place too long. I have seen a pair of alligator clips that have a screw to adjust the tension. These work quite well when properly adjusted.
Use clips and/or clamps on just about any place that has enough skin to get hold of. Nipples, though harder to use on men than women, are still a good place to put them. The scrotum is also an easy place to attach clips or clamps. What most people don't realize is that the bottom, the tushy, the butt, is also a great place to attach a few clips or clamps. You can put clips or clamps on the the inner thighs as well. The tongue, if you want your guy to stop talking so much, is a good place for them. Try the toes or the nose, too. Stay away from the eyes. Besides, it's very difficult to get a clip to stay on an eyeball! Too slippery!
Feathers & Such: I talked about tickling before, but this is different. You can use a feather to very sensuously stroke any part of your partners anatomy. Since the object is sexual arousal, I suggest staying away from tickling except when you are in an especially playful mood or your partner is one of those who gets really turned on being tickled. Don't carry it too far so as to make your partner angry. That would defeat the whole purpose. I have found that ostrich feathers work exceptionally well for this. They are very light and may require more pressure to actually be felt.
Use the feather in a sensuous way. If you don't have a feather, you can use a piece of an angora sweater, or a very soft paint or makeup brush. The goal is to turn him on and get him to attempt to make you press harder with the feather or brush. If he strains to reach it, you are doing it right.
Good Vibrations: Vibrators! I love a good vibrator, especially when I am teasing and tormenting my husband. You can use just about any vibrator you have. It doesn't matter if it is a large corded vibrator or one of those tiny egg types. Anything that vibrates will work. Place it against his cage. It may make a lot of noise, but he will feel it all over his penis and probably his scrotum as well. You can use it to relax his muscles, or tense up his groin. Both will be very effective.
Have him use it on you to relax your muscles or to give you a few orgasms. Use it to give yourself an orgasm while he watches (oops, that's visual). Oh well, whatever you want to do with it will work. Try placing a vibrator against his anus. This is a very sensual spot for most men (women too). And speaking of the anus...
Anal Fun: You should have a an anal plug or two in your toy bag. Put plenty of lubrication on one and gently push it into his bottom. Once in place, touch the end still sticking out of his bottom with the vibrator. How's that for stimulation? You can use dildos of various sizes as well as plugs. You can milk his prostate (I'll get into that later) or send him to the store with a plug in place. Make him do the housework with one. You can even use your finger