will you be able to achieve the same orgasm with the valve closed and have nothing come out or will the valve need to be open
You have almost the same ejaculation with a closed seminal vein valve as before. Only the tiny portion that normally comes from the testicles and flows through the vas deferens is missing. This is a maximum of 5 vol.%. The largest proportion (95%) of ejaculation is still produced by the prostate and vesicular gland and remains exactly the same. No man or woman will be able to determine from the amount of ejaculate whether a valve is present at all or in what condition it is.