Some women like a cleaner look. It always looked good on Bruce Lee so why not shave your chest? The hairy chested look kind of left town in the 1970's and I'm not sure it is coming back anytime soon. Here is some advice.
If you are planning to shave your chest you may want to soften the hair first. To do so, take a long, warm bath beforehand. Use a shaving gel or shaving cream to moisturize your skin and to make the hairs easier to shave. Applying shaving cream a few minutes before shaving softens the hairs but if you are shaving in the shower it will rinse away before then.
Be sure to use a sharp blade. You might try using a new blade so that you don't irritate your skin.
When shaving, stroke an area no more than twice to reduce skin irritation. Go with the grain (downward for your chest) to prevent irritation and ingrown hairs.
Be sure to clean the area afterwards with soap and water to reduce the risk of infection. Then follow up with some moisturizer.
Go as long as possible between shavings
to reduce skin irritation.
Many atheletes shave to promote healing
of skin abrasions. Without hair tangling in the inevitable scab
those abrasions heal much quicker. This applies more to the arms
and legs, but excercising without a shirt does allow chances for
road rash on the chest.
If you have hairs growing out of your nipples, you should consider tweezing. It's painful,but like any repetitive pain you can hope to more easily endure it over time. To make the pain more bearable hold the skin down with one hand while you pluck with the other. The less the skin is allowed to move, the less pain you will feel.
One alternative to shaving and tweezing is to wax the chest. There always detailed instructions with each product available over the counter. Waxing can be painful though as you tear out all of your chest hair at one time. The results will last about 3 weeks.
Another alternative is to use a product like Nair for Men on the chest. It works fairly well and lasts a couple of weeks but in some cases it can give you a nasty chemical burn.