EXPERTS
Short (text version):
If you want to dive deeper into the theory:
You have the parasympathetic nervous system. It's a complementary system that stimulates the "rest-and-digest" or "feed and breed" responses that occur when the body is at rest. One of its primary functions is initiating arousal at the beginning of intercourse and engorging the penis.

Parasympathetic system is activated in the beginning of sex, but as your arousal grows your sympathetic system takes over: heart rate goes up, you breath more often. By the time you orgasm, sympathetic is fully activated, while parasympathetic system is completely de-activated

The longer you keep your parasympathetic system activated, the longer you will last and control your orgasm.

With this in mind, how do you keep your parasympathetic system activated for as long as possible?

The simple answer is: you need to relax.
Breathwork Theory
theory
ExperT
Dr. Justin Houman
MD, urologist and fellowship-trained Male Reproductive Medicine and Surgery specialist, UCLA whose practice is focused on men's health, include male hormone management, sexual and ejaculatory dysfunction
ExperT
Cameron Fraser
Australia's Leading Men's Sex Coach
Sattva Yoga Teacher & Wellness Warrior Founder
Caleb Jude Packham
Expert
Certified Sex Therapist, Family Therapist
Natalie Goldberg
Expert
Expert
Hakima Tantrika
Sex, Love, & Relationship Coach, Writer and Educator
Diaphragmatic breathing
As you exhale through pursed lips, draw in your stomach muscles, letting them fall inward. The hand on your upper chest must remain as still as possible.
Breathe in slowly through your nose so that your stomach moves out against your hand. The hand on your chest should remain as still as possible.
Place one hand on your upper chest an[d the other just below your rib cage. This will allow you to feel your diaphragm move as you breathe.
Sit comfortably, with your knees bent, and shoulders, head, and neck relaxed.
Practice:
We advise practicing this technique for 5 minutes 3 times per day, and you'll be able to implement it in real-life scenarios in no time.
Repeat:
The diaphragm is a large, dome-shaped, muscle located at the base of the lungs. Your abdominal muscles help move the diaphragm and give you more power to empty your lungs. Diaphragmatic breathing is intended to help
you use the diaphragm correctly by activating your belly.
Diaphragmatic breathing is beneficial to learn when you want to last longer in bed.
Practice 1
Box-Breathing
Now repeat those steps until you feel re-centered.
Then you slowly exhale through your mouth for a count of four. And hold the breath again for a count of four.
Then you hold your breath for a count of four. Do not inhale or exhale.
You simply breathe in slowly for a count of four, you feel the air entering your lungs.
We advise practicing this technique for 5 minutes 3 times per day, and you'll be able to implement it in real-life scenarios in no time.
Repeat:
Practice:
Another popular technique is called box-breathing
Practice 2