Some questions, im a little confused.

I like to think my prostate is fairly receptive to stimultion now, considering its been 11 and bit years thats only standard....

Some things bother me though and i just want to know why exactly these things happen;

1. Why do some guys have lots and i do mean lots of precum, like this guy here:

https://www.xtube.com/video-watch/handsfree-edging-with-aneros-II-86248

https://www.xtube.com/video-watch/Aneros-Cum-Denial-30756921

Makes me so jealous! i can vigrously have a dildo session (not aneros, more a milking thing) and get maybe 1 or two drops max

2. I can get a dry within minutes of device insertion, which is great but usually after these (maybe 2) they either never return at all and the session ends or they come back (i have to be super aroused though) and theyre never even close to being as good. Why!?

3 Is it true that larger devices might result in slower muscle contractions? i find smaller ones seem to make my muscle spasm in a counterproductive manor, its so fast it kills it dead. This usually happens when my legs are flat on a bed, if i raise my legs then it doesnt happen at all.