There is no "Wall" for casual sex. "The Wall" is for marriage only. Women think they have options throughout their 30s and 40s because they keep getting hit on by guys. But when they are ready to settle down they can't find a decent guy to marry because all the decent guys are importing younger and hotter women from overseas. My officemate just did this, after deciding that he's had enough with American women - he just married his new teen mail order bride a couple weeks ago, after his last girlfriend who was nearly 30 dumped him.