The short answer to that question, is that God made them that way.
The longer version is that embryologically the embryo is not determined as to whether it's male or female right away, so both have exactly the same characteristics. They have the nipple, and the mamalar ridge. And so those things are determined further on in development as sex is established, even though it's there ahead of time it's not always clear early on.
So I believe that is why both sexes have nipples though men do not utilize them the same way that they're used by ladies for breast feeding.
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excellent job on this video. here is some more in-depth research on early embryo sex differentiation.
Quick genetics lesson. Cited from "Essentials of genetics 9th edition." Author William s. Klung. Page 88 first paragraph continued from page 87. "During early development, every human embryo undergoes a period when it is potentially hermaphroditic. By the fifth week of gestation, gonadal primordia (the tissue that will form the gonad) arise as a pair of gonadal (genital) ridges associated with each embryonic kidney. the embryo is potentially hermaphroditic at this stage it's gonadal phenotype is sexually indifferent-male or female reproductive structures cannot be distinguished, and the gonadal ridge tissue can develop to form male or female gonads. primordial germ cells migrate to these ridges, where an outer cortex and inner medulla form (outer and inner parts of an organ). The cortex is then able to develop into an ovary, while the medulla may develop into a testis. In addition, two sets of undifferentiated ducts called the wolffian and mullerian ducts exist in each embryonic. wolffian ducts differentiate into other organs of the male reproductive tract, while mullerian ducts differentiate into structures of the female reproductive tract." Now for a quick summary on what causes the male or female reproductive structures to be expressed. basically, it comes down to the SRY gene, this is located on the Y chromosome and at the seventh week the gene express itself and development of the medulla into a testis starts. If there is no Sry gene then the Mullerian ducts form the fallopian tubes, uterus, cervix and so on. many organs of the male and female anatomy are homologous in that they derived from the same structures. examples: The penis and clit are formed from the same basic structure, ovaries and testis you see the trend. like so people can see (never thought I'd say that lol..)
Marin Community Foundation and Asian Americans/Pacific Islanders in Philanthropy.
Overall, US-born Muslims make up the largest percentage at 34% of all Muslims in the Bay Area, followed by 14% born in Pakistan, 11% in Afghanistan, 10% in India, 3% in Egypt and 2% each in Iran, Jordan, Palestine and Yemen.
Silicon Valley Pakistani-American by the Numbers:
There are 35,000 Pakistani-born Muslims in San Francisco Bay Area, or 14% of the 250,000 Muslims who call the Bay Area home, according to the study. Bay Area Muslim community constitutes 3.5 percent of the area’s total population and is one of the highest concentrations of Muslims in the country.
As of 2013, South Asian Muslims, including Pakistanis, have the highest income levels, with nearly half (49%) of them having a household income above $100,000. In comparison, those groups with the lowest proportion of household incomes above $100,000 were Hispanic Muslims (15%), Afghans (10%), and African American Muslims (10%).
The Bay Area Muslim community is very diverse in terms of race and ethnicity:
South Asians (30%)
African Americans (9%)
Asian/Pacific Islanders (7%)
Based on the survey findings, the majority of Muslims live in the following three counties:
and Contra Costa (12%)
Thousands of Pakistan-born techies are working at Apple, Cisco, Google, Intel, Oracle and hundreds of other high-tech companies from small start-ups to large Fortune 500 corporations. Pakistani-Americans are contributing to what Erik Brynjolfsson and Andrew McAfee describe as "The Second Machine Age" in a recent book with the same title.