Regarding her horrible boss in Warners’ “Horrible Bosses,” Jennifer Aniston said she had no trouble being a potty mouth. However, some research was required to play her dentist character. “I did go to the dentist right beforehand though — to see how they hold the tools. The rest was easy,” she joked at Friday’s Waldorf Towers press junket in Gotham.A blackmailing photo series in the movie required that a nude, unconscious Charles Day be Aniston’s play toy. “That was an actual photo shoot,” Day began. “I should say,” noted director Seth Gordon. “My wife was the photographer.” The pic could have been raunchier, according to co-screenwriter Michael Markowitz. In an early draft of the script, the name for Jamie Foxx’s Motherfucker Jones character was Cocksucker Jones. Foxx reportedly nixed that contribution. “Jamie thought that was over the line,” said producer Jay Stern.