Several BM's have written complaining that their ejaculate volume has decreased to a few drops per pop. I have had this same complaint.
One week ago I began a daily dosage of 1500mg L-Arginine & have already noticed a significant increase in my ejaculate volume during climaxes brought about thru wanking. Have not been so fortunate as to try intercourse yet. I am only a layman & am therefore not recommending L-Arginine. I am only sharing a successful trial.
I speak only to ejaculate volume & not at all to erectile dysfunction. On the subject of ED, however, I read that an MD studied groups of men of different ages who were afflicted with ED & concluded that L-Arginine was not an effective remedy for ED. However, this "professional" was writing on the website of a company that produces an exorbitantly- priced superduper (to hear them tell it) male sexual enhancement placebo. So, take it for what you feel its worth.
CHEERS