: Increased heart rate and blood pressure often lead to heavier breathing. Moans are frequently the result of exhaling against a partially closed glottis (the opening between the vocal cords).

: High levels of physical tension (myotonia) during the plateau phase of arousal can cause vocalizations as muscles in the chest and throat contract. The "Copulatory Vocalization" Phenomenon

At its most basic level, moaning is an involuntary response to physical pleasure. As sexual arousal increases, the body undergoes several changes:

: Vocalization provides immediate, real-time feedback to a partner, signaling what feels good and encouraging the continuation of specific movements.