yes I know you can buy "Throb" from Penny to turn your MC into a herm, but you have to buy more then one to get anything larger then 5 inches. And you don't have very many credits to start with, what with buying the Joy co. shield gen. and any ranged or melee weapons from Carl. That's why I prefer to save up my credits when starting out, instead of buying a bunch of Throb.
Also the Kui-tan have more perks to offer then the other starting races.
ps. a lot of my other reasons why Kui-tan are my favs. have already been listed by others and I didn't feel like reiterating them.
Start as male, buy Ovilium for 300 creds. Single use turns males into herms with 100% reliability and without side effects.