I'm currently considering signing up for a local clinical trial dealing with premature ejaculation. My average time from penetration to ejaculation is 5 minutes. My wife feels that I don't have a problem since she has no problem reaching orgasm and in comparision all her previous lovers did not last any longer. My question for all of you is, what is your/your partner's average time from penetration to ejaculation? I know time takes on a different perception during sex and it's a tendency for everyone to over-estimate how much time has passed. But a fair estimate would be very helpful to me.