Calling all university studs! The Shanghai sperm bank is setting up a branch in university-friendly Songjiang district to encourage more frequent visits. As an additional incentive, the bank offers 50 yuan for the first sample, and if you’re a good donor, 200 yuan for every subsequent, uh, turn. Why Songjiang? Because university students represent 95 percent of the sperm-donor pool in Shanghai. Although the bank has quite the supply (20,000 units of sperm), only about 10% are usable for conception, due to health reasons or “low sperm quality.” Couples may wait up to year for a viable sample — hence, the additional search for donors. Get cracking, men!