Posted by Rube on April 16, 2004
In Reply to: Nice guys posted by Rude Boy on April 16, 2004
: It is all to do with sexual etiquette"
No it doesn't. It has been used in this context, but only in a humourous vein and only after the phrase had currency.
"However, it is a fallacy that moral or good mannered people cannot succeed, but it does usually take a little longer"
Certainly this phrase does not imply that "nice guys" can't succeed; only as you note, "it does usually take a little longer".