I suppose you could, but i would not recommend it.
No there is no harm.......... Just keep pump it on (twice or thrice a day)
You can not get pregnancy with saliva. Saliva does not contain sperms. Sperms are must for fertilization to take place.
No. I believe if would smell odd though.
No, that's how it works. It's no good stuck inside.
3 MINUTES
No.
It takes 2mo for the Testes to produce mature sperms and another month is needed for it to travel through the ejaculatory duct to the outside
No
YES
There are no disadvantages to it. Sperms are made new all the time and it's in fact recommended to "loose sperm" at aleast twice a month to prevent prostate cancer.
Pooping is not bad. It's not good to hold it in everyday.