Orgasms

Sooo I come so fast during masturbation whether it’s me pleasing myself or my gf pleasing me! It comes soo quick and once I come I can’t be touched it’s like my clit is so sensitive. My body is weak but howwww off 10mins MAYBE lol However my gf can keep have orgasms back to back! Im low key jealous I want endless orgasms lol (no seriously) I feel like my body is being selfish. Are there any tips I can use “train” my body to go longer??