How to make my cum more liquid/watery?

I see lots of folks on here asking how to make their cum thicker, but I haven’t seen any in the other direction yet. I think a huge barrier which is preventing me from shooting as far as I’d like is the viscosity of my cum. My boyfriend has much more liquid cum and he regularly shoots over his head, so I’m wondering what (in addition to drinking more water) I can do to help thin out my cum?