What's the average time a guy can last before ejaculation? cause i'm 16, and i can last only 45 seconds

Ejaculation: Time is not important because you can ejaculate without touching yourself or being touched. This is why it is important to learn to bring your partner to orgasm without necessarily using your penis when and if you have sex. Ask them to teach you to use your hands for this so you can stop worrying about how long you last before ejaculation.