Recently, I read an amazing editorial questioning whether or not the arrested development of this generation's males is caused by girls' willingness to have sex with them.
Here's the logic. Men want women, and do what it takes to get them. They dress nice, improve their grooming habits and obtain a marketable education to secure a high-paying job.
But, this only works in a competitive market. If girls are willing to sleep with guys regardless of merit - if expectations have lessened to the point where girls have sex without any prerequisites whatsoever - then a key evolutionary driver for the male species has been destroyed.
They're not lazy. They're simply getting what they want without the work.