There is not: Simply put, there is no such thing to reliably accomplish what you ask. Ejaculation is the culmination of the sexual response plateau which is shortly followed thereafter by detumescence of the erection. Factors that affect it include overall health, fatigue, length of time since previous ejaculation, stress factors, etc. Everyone is going to notice some days are better than others. Enjoy.
Answered 5/10/2018
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