I recently bought a very large anal douche and was thinking of using it while in the bath to inflate.

The bulb of the douche can hold up to 460ml of water and can be separated from the nozzle, which is a very long 6.5 inches. My idea was to run a regular old bath, no bubbles or anything, slide the nozzle up my butt and then use the bulb underwater to push water up my butt. As the bulb can come apart from the nozzle, it'd be very easy for me to refill it without having to take the nozzle out and with the bath water I'd have plenty of water to fill myself up with at my disposal. The only thing is I might not get as big until I stand up due to gravity. I was going to lie on my back with my knees up but lying on my side could be a better position. I'm also wondering how far I should insert the nozzle, whether I should only put it in so far or try to get it as far in as possible which might help me get bigger.

I haven't tried it yet and I'm not entirely sure when I will, but I was wondering if anyone has done something similar or has any advice.