In the movie, we see Bonnie and Clyde in bed together for the first time. She is kissing him, and then starts going down his chest towards his pants. Was Bonnie going to perform fellatio on Clyde? Is there any information as to whether or not she did oral sex, or is it just Hollywood hyperbole? Thank you.
NO, there is no reliable information. The theme of Clyde as impotent was imagined by writers for the movie script. Clyde was reported to have been raped in prison and that was the basis for later stories about sexual preferences. Such information as there is, and that is only offhand remarks by associates, show the usual male/female relationship and apparent devotion to each other.
^^^ Clyde got back at his rapist and killed him with the assistance of another prisoner, and, a few years later, he and Bonnie went back to the Eastham prison to free their friend, Raymond Hamilton. In the process, they also killed a couple guards and released a few other prisoners. Unfortunately, one of them, Henry Methvin, would be their undoing. Methvin's father arranged the ambush with Frank Hamer et al. in order to get his son a lesser sentence.
OP, no one really knows what Bonnie was like in bed, but at the time and thereafter there was a rumor that she was a nymphomaniac and would sleep with several members of the gang. It was even stated that she and Clyde would have threesomes with a male member of their gang to satisfy both her and the bisexual Clyde. In fact, the original script for the movie had a similar scenario between Bonnie, Clyde, and the C.W. Moss character, who is a composite of 3 gang members -- Hamilton, Methvin, and W.D. Jones. However, this original subplot was scrapped because director Arthur Penn thought the characters would come off as freaks and thus alienate the audience. Good call because historians now believe these sexual rumors about them are rubbish, cooked up by law enforcement to discredit them.
I recently watched the 2-disc special edition of "Bonnie and Clyde" , and there is further talk by the people who worked on the movie. The script had references to Clyde's bisexuality, but as stated earlier, this was omitted and the theme changed to his impotence. Oral sex was "suggested" with Bonnie going down on Clyde, i.e. her performing fellatio. There was nothing stated about Clyde performing cunnilingus on Bonnie.
Reference: Special Features of above mentioned movie. Revolution: The Making of Bonnie and Clyde. Releasing Bonnie and Clyde. Specifically, at @2.30 minutes of this reference.
It was believed that Bonnie prostituted herself on a number of occasions before, and even after meeting Clyde (such as while he was in prison). This was life during the depression, and Bonnie's family were very poor, and "literally came from the wrong side of the tracks ". So if you question is "did the real Bonnie perform oral sex?", the answer would be an almost certain "Yes."
As another poster noted, the press made-up a number of salacious rumors about Bonnie Parker out of whole cloth.
PBS just broadcast a wonderful documentary about Bonnie Parker and Clyde Barrow. They actually spoke to the few living witnesses to that period and surviving family members. They did address a reality, young Clyde had been raped in prison and the first man he ever killed was his rapist.
Bonnie was a young waitress who lived with her mother after being abandoned by her husband. Although she was poor as was most of the country because of the Depression, she never prostituted herself. She loved Clyde, was attracted to his flashy clothes and dangerous life. Although she could have turned herself in, made the choice to die with him.
The sex scene in the movie, was just that, a sex scene in a film meant to be daring in the late 60s.