I've been meaning to ask this for quite some time, even at the point of appearing quite naive. I am always amazed at the ability of JAV male actors to seemingly control their come shots for an extended period of time- despite the fact that in most cases, some gorgeous actress is screaming her head off, talking dirty to him and begging him to fuck her. I know editing can fix premature come shots r(although I have not spotted a cut in any films I have seen), and the fact that this is their business and they are performing in front of a camera crew. A western porn star once replied to this question with the response-Hey, they do this everyday." Maybe that's it, or medication, or perhaps great ejaculatory control. If anyone has an idea on this, I would really like to hear it. Thanks.