Hi
Orgasm control is most easily learned through solitary masturbation, although many individuals enjoy including elements of orgasm control in sex with a partner. Masturbation provides the individual with the opportunity of learning about their bodies and the amount of pleasure they can experience without reaching orgasm. Self-stimulation can help both men and women acknowledge the limits of their body and the techniques that may help them in controlling their orgasms.
Next Steps
so while doing mastrubation, please stop before reaching climax, dont mastrubate till you eject, let the arousal come down, then again repeat so that the volume of the semen will also increase, this is how you can practice and control orgasm by self as well with partner. that's how you can escape refractory period and can enjoy sex for longer periods.
Health Tips
do regular exercise, drink more water, do breathing exercises, avoid tea, caffeine, smoking and drinking.