ICastFist , 4 hours ago

Because fingers get tired and, in the case of women, the object can go further inside than her fingers. Depending on setup, she can go hands free, too.

Sticking a dick in a vacuum cleaner is not a proper comparison because most of the dick is protected by skin and even the glans will mostly be fine with the same dirt/contaminants that you can wash off your skin.

Anything that gets inside your body represents a much greater risk of infections. A better comparison would be to a man pretend sucking something or sticking it up his ass.

Please don’t skip biology classes.