Sonnet: "Friends with Benefits" (corrected and revised)

Your friends with benefits are no true friend:
as (au contraire!) your friends when used are a
perverse weed from which you must then defend
against when trust and friendship sweep away;
your friends aren't lovers' toys to be abused
or spent on reckless nights of screwing (them)
where prudence is forsaken and unused
because you just feel like it on a whim.
But if you choose to love your now good friend(s)
then do so at your own risk and danger
as oftener than not you'll in the end
only create just another stranger:
     if you err in this but ne'er broke your word,
     then this you may forswear you read or heard.