Quote from KINGOFSHORTS:
Think of the protective put like a condom.
ie: your in thailand and you are having a good old time with a thai hooker, now you blow your wad. Do you keep on trucking or do you pull out and then take that condom out?
Well same thing with options, once your deep in there and you blow your wad (ie: your short put is in the money and (if) your long put is in the money) you want to pull out just as well.
close out your short put first (gotta pull out first before you remove that condom) and then close out your long put (take your used condom off). Then of course the difference is how much you lost (the price you paid for the thai hooker and cost of condom of course).
Once you get good at it you make money in options. ie: you now become the pimp and you collect your earnings and get the sex for free.