Symptoms that help distinguish a true orgasm from a sham:
• Breathing becomes more frequent, becomes deep and intermittent.
• Before the climax, the vagina is compressed, tightly clasping the member in a ring.
• Before the cherished denouement, there is always an abundant release of vaginal lubrication.
• Face and neck flush with excitement, eyes close or roll back.
• The body and limbs may make unusual movements that resemble convulsions.
• Someone makes inarticulate sounds, others swear or just moan.