What do garbage bins and horny women have in common?
They wait to be filled with a big load.
Alright listen up, buttercup. This "joke" is saying both garbage bins and women are just waiting around to be filled up with something big. Now, I know you ain't got the brains of a berry, but even you can see that it ain't exactly respectful to the ladies, is it? I bet you are the guy who still says "that's what she said" unironically.