How does sexual arousal affect breathing?

As people grow increasingly aroused, first their breath will deepen and their respiration rate will increase, like they’ve been running, then they’ll begin to hold their breath as their muscles clench rhythmically. This is a necessary and universal predecessor to orgasm. You’ll hear rhythmic gaspy-chuffy noises and see their bellies rise and fall sharply with the sounds. Don’t mistake noisy for intense. Many people are nearly silent at orgasm. When a person goes all quiet and still but is tense, that’s a sign of a high level of arousal.