Aristo runs aren't limited to Nigeria. . . . . .

http://en.wikipedia.org/wiki/Enjo_k%C5%8Dsai

Enjo-kōsai (援助交際?) (shortened form enkō (援交?)) means "compensated dating" and is a practice which originated in Japan where older men give money and/or luxury gifts to attractive women for their companionship, and possibly sexual favors. The female participants range from school-age girls to housewives. A common misconception is that enjo-kōsai always involves some form of sexual activity. In the opposite case of women paying men, it is called gyaku-enjo-kōsai (逆援助交際?), or "wakari