I agree, I've experienced this direct from the source only while hooded with the blindfold in place. ( This hood with a funnel placed in the end of the breathe through gag's tube)

https://www.top-to-bottom-leathers.co.uk/Bondage-Equipment/Leather-Hoods/Leather-Controller-Hood.htm

The only time I had my sight the golden was poured from a glass beaker into the funnel.

The shock of it filling my mouth was vary hot but so was watching her start to pour. I guess both ways really worked for me.