Why does Rand Paul keep attacking Bill Clinton about sex?

Off the top of my head, here:

1. He believes in the principle of workplace equality and is dismayed at how predatory individuals seeking personal sexual pleasure have disrupted the meritocracy that should prevail.

2. Someone on the Republican side needs to be able to counter the “war on women” propaganda of the Democrats, and no one else seems to have the guts or skill to do it properly.