Explanation:
The original "pillow talk"-scene had Marla saying "I want to have your abortion".
When this was objected to by Fox 2000 Pictures President of Production Laura Ziskin, David Fincher said he would change it on the proviso that the new line couldn't be cut. Ziskin agreed and Fincher wrote the replacement line, "I haven't been fucked like that since grade school".
When Ziskin saw the new line, she was even more outraged and asked for the original line to be put back, but, as per their deal, Fincher refused.
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