Sperminator strikes again — this time donating his seed to 18-year-old who lives in an East Harlem shelter. Her daughter, due July 12, will make it number 50 for the serial sperm donor. Ari Nagel, 43-year-old CUNY math professor who donates his sperm to women across the globe for free, has racked up serious spawn this past year: 15 babies since last Father’s Day, bringing the grand total to 48. One woman is due to give birth in early July, followed by Kaienja Garrick, who lives in the East River Family Center, a family shelter with a shared bathroom and...