While having sex, i ejaculate too fast, like in 3-4 minutes. how can i last longer preferably without taking any medications?

The following: Stop thrusting as soon as you have earliest sensation that you are about to ejaculate & either you or partner squeeze base of penis hard until sensation ceases. Always empty your bladder before sex as full bladder can hasten ejaculation. Can use topical lidocaine gel as lubricant, will make penile glans less sensitive without reducing pleasure or sexual climax.