Black Widows

Aiight, another issue that's been bugging me.
What's the deal with Black Widows (I mean besides being freakingly deadly spiders)?!?! Like, who was the sympathetic moro that named them "widows" and not "murderers"? I've struggled with this problem. Part of me wants to be sympathetic and helpful towards the Black widow because she is "widowed". Then part of me watches the Discovery Channel and realizes she's a repeat-murderer who has a psychosexual imbalance. So why in the world call them poor "widows"... if anything the male spider should be getting a share of the alimony and the pleasure of seeing his ex-wife sentenced to the highest possible punishment. That's what I think... Because I'd be freaked out if my wife was a sick killer... I'd be dead too.