This is achieved via frequent masturbation to the point of orgasm. This is still achieved via sexual intercourse.
surgery
I've heard that strippers regularly use a lead pencil on their nipples to make them stand out more, but I'm not sure how effective this is!
Chloroform is no longer used for Surgery
Have surgery.
Men's nipples can appear longer due to various factors such as hormonal changes, weight fluctuations, or genetics. During puberty or due to hormonal imbalances, increased levels of estrogen can lead to breast tissue development, which may make nipples seem more prominent. Weight gain can also cause the surrounding tissue to expand, making nipples look longer. Additionally, natural anatomical variations mean that some men may simply have longer nipples than others.
sorry there is not any know way to science to do so without surgery
why would you want your nipples bigger anyways?
surgery
yes there is so weather you be male or female chin up! more exwsersize that slowely takes fat out the nipple and reducing nipple size also there are many herbs that can reuct the breast gland and nippels.
You should study the ancient Chinese, they made there feet smaller without surgery. But it did make the feet look awkward, and was very painful.
The same way you make a guy's nipples hard.
Makeup.