Are there any techniques for developing or increasing nipple sensitivity?

I think this is largely a 'rewiring' matter of teaming very gentle nip play in very tiny spots on the nip with anal, prostate, lip or glans play. Other guys find more pleasure in working the entire Areola. I like gentle play through a well worn T-shirt to avoid over stimulation.

You might consider small suction cups like SuppleNips (tm). (handy if you want continuous nipple stim when in the belly position.)

Here's a link to a specialized interest group (you have to jump through yahoo's adult group hoops): < http://groups.yahoo.com/group/nipple_orgasm/ >

So gentle touches help to bring about sensitivity better than trying to get the most stimulation?

I've found two or three tiny (about one-millimeter diameter) spots on each teat that are super sensitive. A gentle flick to that area or a gentle stroke through the t-shirt to bend the teat into or away from one of those spots is the touch I crave. I find that my wife is overly rough with my nips (I'm just a sensitive sort of guy ! 🙂

Mapping the sensory nerves on your nips is much like mapping the sensitivity along the frenulum on your penis or under your tongue. find all your micro-buttons !

I've found the tips of my nipples to be rather sensitive, while the rest I can hardly feel. I remember even the tips not being sensitive at all before, and the I'd feel more from my index finger than the nipple it was stroking. I started out grabbing them between finger and thumb and massaging rather than stroking, and found I could at least get aroused somewhat by it. Later I found stroking to produce new sensations. And I've also found that I can feel quite a bit sometimes from lightly scratching the tip while covered by a T-shirt. I haven't been able to do a whole lot with this besides get aroused and feel sensitivity on the tips, and would like to see if I can develop and or progress using this. One thing I'm wondering is if this can eventually help me feel my prostate.

@Jspad My nipples were not very sensitive to begin with but Nipple sups changed all that after a number of sessions. I made my own out of the bulbs of baby pacifiers. However they are curtainly not as good as the real thing, no where near as powerful. My nipples are now directly linked to my penis, touch my nipples and the aneros feeling in a session go from good to "boonta" in a second!
https://www.nipplefunwear.com/index.php

I'd agree with rook - this is a matter of rewiring. Just as with aneros use, you can "teach" yourself to respond to tiny sensations, by simply enjoying them. In this way your sensitivity to these sensations grows, as does your response to the sensation.

I used to be a nipple-non-sensitive type, but now mine give me wonderful multi-orgasmic experiences.