This question is primarily addressed towards those who've had their breasts augmented either by hormones. (I'm not sure if that is the right term, so if it is not, please excuse my ignorance.)

I am not a TS. I'm a hobbyist who enjoys his nipples stimulated. I am finding that the more I stimulate them (or have them stimulated by my S.O.) overtime they are getting more responsive to stimulation. I don't get full wood, but I do get past half-mast just by some decent nipple stimulation.

I was wondering for those who have had their breasts increase in size by non-surgical means, if you have notcied your nipples getting more sensitive? If so, do you think it is because of hormones and the like, or are you naturally finding yourself just wanting to stimulate yourself there more? I've read in some Tao literature how there is a pathway in women between the nipples and the clitoris. I am thinking there might be something there as well with the rest of us.

Again, please excuse any clumsiness in the way the question was asked. I am curious about your experiences and if there is any info you can share it's appreciated.

I don't think you want to take hormones. The harmones that grow breasts may keep you from getting hard and cumming. My nipples are extra sensitive. Be sure to tell your provider you like them nibbled on and sucked. Trim the hair form around them so the lady does not get hair in her mouth. Enjoy what you have.

Well I think I can be helpful to some degree short of visiting and stimulating you manually. Here goes.
1.Hormone augmentation, as opposed to surgical breast augmentation will increase the nipple sensitivity tremendously, in fact sucking or touching the nipples often will be more pleasurable to a ts on hormone therapy than masturbation.
Although surgical augmentation may be more spectacular optically, frequently nerves will be cut in the process and one or both breasts nipples may loose sensitivity completely, not always, but very commonly this occurs.
2.The cause of this increase in sensitivity is the hormone therapy, not continual stimulation.
3.Not all men have the same degree of nipple sensitivity; some really get off having their nipples sucked or played with, others have almost no sexual sensitivity at all.
4. It is a known fact that even a male nipple that exhibits little sensitivity can be made more sensitive by continual stimulation. If you have a moderate degree of sexual response to begin with this can be ramped up if you exercise frequent stimulation. In some extreme cases, the male breast has beem able to lactate under such extreme conditions. I personally experienced a transsexual who exuded a sweet milk like substance from her breast when it was sucked on for a while and this also gave pleasure to her, sadly this phenomena was lost after surgical augmentation.  
5. As for your Tao literature research, you do not have to spend time in a library to be aware of the connection between the nipple and the clitoris/vagina. Most woman's breast/nipples in the natural state, those without implants,are very sensitive to nipple stimulation or touching of the breast and doing so will cause them to open their legs in a plea for intercourse. One sex partner of mine is able to have full blown vaginal orgasms just from sucking and tonguing of the nipple and the breast tissue around it. A hand on the breast and the clitoris will send to into ecstasy.

To your point #3, if someone had asked me 20 years ago if I had sensitive nipples I would've told'em no. (And thought them a bit strange.) Being in the hobby and having some providers suck on my nipples 'awakened' them.

I did spend about a month stimulating them each day multiple times throughout. I got to the point where I would notice them when I walked around the office and my shirt was rubbing them. I had to back off becuase it became distracting. I did notice that even a year later the nipples get larger when erect than a few years ago. Had a few providers comment on the 'erasers'. So I got the quantity angle down. Now am trying to figure out the quality angle to get me closer to possible O's. (No intention of doing hormones.)

Thanks all for the feedback.

on a strictly personal note, I never thought I had much nipple sensitivity, although one partner always pinched and twisted them until I cried out, but it never did anything for me beyond the feeling of pain; however on one occasion at a sex party, two ts had me near nude and were working me over in a crowded room and a third came in and started rapidly tonguing my nips and i nearly went out of my mind and came all over the gal who was playing with my cock --so you never know what you are capable of feeling under the right conditions. If you are into it, keep working at it. I once tried nip clamp son and off for a few months and they were ok, after the initial pain wore off the nips felt excited, but I am too penis orientated to pursue it further.