Love this topic!
I go crazy when guys shoot huge loads. I don't care if it's thick or thin,I just want alot of it!
Now as far as your question,what works for me is a couple days off,then a nice long edging session. It won't be a super huge load for me, but a decent one at that. Also,I think how hydrated your body is,can determine the quantity of cum,and consistency. As far as any chemical methods,-that I don't know. But if it makes your cock shoot rope after rope after rope of hot cum,I say -go for it!
Nothing! better than bust'in a huge! nut!