just gonna copy and paste an old post i did a couple months back
btw, the masturbation suggestions, just want to make a point that u move ur HIP not your hand, it should give you a better feel on how it would be during sex. it makes sense since you move ur hip while having sex.
Below is the copied and pasted post:
there are two things u can do.
1) use a condom like Durex Performax, the condom actually has a lubricant inside the condom that helps you control climax.
2) breathe and slow down!
Slow down ur breathing when u thinking ur near climax and do deep breathing the ones u can feel in ur gut. ur body is reacting to the sensations its feeling as ur having sex, as u near ur climax ur breathing quickens and shortens as a reaction which in turn pushes for climax so slow ur breathing and take deep breaths. The other thing to do while u slow ur breathing is to slow down! ur penis is getting quite a bit of sensation when ur having sex and the faster u go the more friction so don't go humping like a rabbit.
you can actually practice this by masturbation. lock urself in ur room and have 30 minutes to urself. then go at it slowly, and notice how ur body reacts as it gets closer to climax, when ur close to ur peak slow down and breathe, at first u might not be able to, u probably just go right thru, but that's why it's practice. after a few times u might start to get the hang of it. if u can last for 15 minutes, u pretty much can control ur ejaculation.
if it doesn't help and it really bothers u, there's sex therapy.
stay safe, have fun and hope this helps