I think i have understood your problem ... but i' m not sur
(I used to be lying down in my bed when I masturbate, and always whith my left hand ) at the begining, I had the same problem : It' s too short and we haven' t the time for to have more pleasure.But I have found the solution : be cool, no be impatient and no stress, take your time. When you have finish ( the orgasm disappear ) wait and alittle of minutes then the pleasure come back so you can beging again. This is a good technic for me .
Do you understand me ? Sorry I' m french...good luck.
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