Aftershaves serve no purpose other than enabling cosmetics companies to sell perfume to men.
BOLD for men is listed by PETA as vegan, cruelty-free and non-animal tested. They sell pre-shave, shaving cream, and after-shave all in one. Here's their website : http://www.boldformen.com/#all
I agree with the above, however. As long as you use clean blades, trim any excessively long hair and be careful (i.e. don't stretch skin or apply too much pressure), cold water is fine.