Since first electron affinity is almost always negative, neutral atoms of most elements (including metals) must have an affinity towards electron. But shouldn't metals want to lose electron(s) rather than having an affinity towards it?
Take lithium for example. It can attain noble gas configuration as it loses an electron. But first electron affinity of lithium is -60 KJ/mol. So, it has an affinity towards electron although it wants to lose one. But wasn't it supposed to have a positive electron affinity?