Been masturbating since i was 10 in prone masturbation ( humping the mattress in my trousers and pants to ejaculate) never by hand i thought it was normal but now i am 32 when i do it by hand it doesnt work and when have intercourse also cant ejaculate..

Your body is used to: the technique which produces more friction than manual masturbation or intercourse. You will need to retrain yourself. Masturbate with lubricant. If you do not achieve orgasm, STOP. Do NOT revert to your old method. Later, masturbate again. If no orgasm, STOP. After a few rounds of this, your body WILL respond. Keep practicing and you will retrain your sexual stimulation threshold. Have fun!

Prone masturbation: Frequent male prone masturbation places significant pressure on penis & nerves at its base & may cause numbing to arousal / pleasure with other positions. Seek help for delayed orgasms, erectile dysfunction or inability to achieve orgasm in other ways. May seek sex therapy. REF: https://www.healthline.com/health/healthy-sex/prone-masturbation#effect-on-sensation