I don't want to dispute what Lilac says, but some of us just do produce lots of lube. For years my E levels were sky high and my T is virtually zero. After a detailed anatomical exam my doctors concluded that effectively I don't have a prostate as such, whether because of some original anatomical peculiarity or because it has morphed into something else I don't know. Either way the big O is not, for me, the moment of fluid production.
What I get, and always have when turned on, is floods of slippery liquid like a thin mucus and I do mean floods of it, to an underwear changing degree. The thing is it can become super embarrassing because I have no control. The fluid just flows right at the point where I am starting to get sexually excited, like my vag knows something I don't... yet! For me that is often the first sign that my body is turned on, when I suddenly feel unexpectedly slippery wet down there.
The first time it happened I was so naive that I genuinely thought I had had an accident, and was confused when I found that the liquid wasn't urine.

My mother assured me that this was actually quite normal for girls.
Post-O I get nothing more that I have already had, which is a blessing because trust me it's more than enough already. Artificial Lube - what's that? No need really... So don't worry Stardust, and indeed anyone else, with luck your body may just be in the early stages of morphing from post sexual fluid release to a pre-sexual one.