For whites, blacks, and Hispanics, the trend holds. Men who have only been with one woman are more likely to have more children with her than men who've been with multiple women are to have with all of those women combined. Asians cannot be said determinatively follow suit. The sample size is too small to put much stake in, although it trends the same way up to five partners, the only portion of the range approaching a useably-sized sample.
The fecundity of black men who've only had one partner stands out as being particularly high relative to the percentage of non-black men who've only had one. Considering the percentage^^ of men from each racial group who've only had a single partner helps clear up why that is the case. Black men are less likely than non-black men to have only had one female partner. The percentage of men in each racial group who've only had one partner:
Whites -- 20.4%
Blacks -- 8.9%
Hispanics -- 18.0%
Asians -- 38.7%
Left-handed black men and Republican black men are both more common than are black men who've stayed true to a single woman! Further, black men are more likely to have had 16 or more partners than they are to have only had one. This is not the case for whites, Hispanics, or Asians.
The rare black man who has only had one partner tends to hold more fundamentalist religious views than do black men who've had multiple partners. Among black men who've been true to a single woman, 79% describe the Bible as the "Word of God". Among all black respondents, only 52% of black men describe the Bible in this way.
Relatedly, for white, Hispanic, and Asian men, the mode (most frequently occuring) for total number of female partners is one. For black men, however, it is five.
I don't imagine any of these statistical descriptions unique to black men come as a surprise to most readers.
* Includes some percentage of Hispanics. I estimate that about 6% of those represented here are Hispanic based on the fact that just fewer than half of Hispanics in the US identify themselves as white when an "Other race" alternative is available, and that the time period included spans from 1972 to 2006, meaning Hispanics represent a smaller percentage of the GSS population than they represent in the US today.
** This classification is not based on racial-self identification. It is in response to the survey question "Are you Spanish, Hispanic, or Latino?"
^ Includes those who identified as their first race one of the following: Asian Indian, Chinese, Filipino, Japanese, Korean, Vietnamese, Other Asian, or Native Hawaiian.
^^ Excluding those who are celibate or homosexual.