Where a gal promises to "pay" you for a favor by spreading her
legs for you afterwards, but then unexpectedly insists that you wear a condom, which of course drastically reduces the
pleasure of the act and thus largely negates any
true value of said "payment".
Any time that a "willing" chick offers me sex in exchange for my assistance, I
always make sure to first ask her if she's gonna let me "do it bareback" before I decide whether or not to bust my ass for her ---
oh, I might still help her out even if she wants me to use protection, of course, but I still like to know what I'll be actually getting out of
da deal --- I've gotten too many rubber checks in
da past!