Premature ejaculation (PE) is a condition in which ejaculation occurs with minimal sexual stimulation—before, during, or shortly after penetration—and earlier than the individual desires. PE can be categorized as primary, present from the first sexual experiences, or secondary, developing later in life. Additionally, PE can be divided into several types:
• Ejaculation before penetration (ante-moenia);
• Ejaculation upon penetration;
• Ejaculation within 1 minute of penetration;
• Ejaculation between 1 and 2 minutes of penetration
And
here is a newly proposed conceptualization and definition for PE:
progressive arousal disorder is the inability to modulate, regulate, or decrease arousal during any sexual activity, even with brief stops during sexual stimulation, causing unwanted ejaculation.