The British actor - who inherited the role of the suave spy from Pierce Brosnan - was not confident his appendage would measure up to the expectations of 007 fans and asked for stand-ins to do the nude scenes instead.
He said: "I had stunt men all the way. Stunt p**is? I've got four or five." Despite his bedroom jitters, the blonde actor insisted on doing his own action stunts, even though he often ended up getting injured.
He added: "I got hurt every day. All the stunt guys are as hard as teak - I couldn't show any pain in front of them." Although he is worried about his penis, Craig apparently has nothing to worry about in that department, according to his co-star Dame Judi Dench.
The actress - who plays secret service boss M in the movie - caught a glimpse of the hunky actor's privates as he was getting dressed in his trailer, which was situated opposite her own.
She revealed: "It's an absolute monster! Maybe I shouldn't have said that.
How uncouth of me!"