I never fully understood that phrase until a couple of days ago.
I asked The Boy for money because he is the only one that had any. His friend was at our house that day.
The boy tosses me his wallet and says, "Take what you need."
His friend said "That wasn't very smart"
I took all of the cash out of his wallet (about $100) and said "Thanks!" and tossed his raped wallet back to him.
The look on his face was priceless. Shock, awe and disbelief. After he picked his jaw up off the floor, I gave him back all but $40.
Then I proceed to explain his fatal mistake.
"When a woman asks you for money, don't EVER toss your wallet and tell her' just take what you need', she will inexplicably need it all every time"