Some can...Marilyn Manson had two ribs removed for that for example
No, this is just an urban legend.
Originally, this myth started with Prince.
Then, in one of his shows, Manson was seen by police performing oral sex on stage. The police thought is was a man but it was actually a woman wearing a fake penis. It was a way Manson promoted his ‘brand’. Through ‘scandalous’ imagery.
Manson himself believes that's how the rumor started.
Media frenzy took over and the rumor spread that Marilyn Manson partook in a operation to remove his ribs in order to be able to give himself self-felatio.
The fact that there are two artists in this rumor should be a clear indication that it's false. Both artists are known for being eccentrics, not stupid.
Manson is very intelligent man, in fact- try and watch some interviews with him; you will be positively surprised.
Marilyn Manson has also gone on record and said that he never underwent such an absurd operation.