Yep!.
Typically yes! It's a survival technique. Snails normally lay their eggs in the dark. To help encourage laying you can drape the aquarium with a towel or blanket.
Some species of snail can reproduce alone because they are hermaphrodites IE. they posses both male and female reproductive organs. they can change what sex they want to be and make babies.
They find a mate and stick together, I mean literally STICK together. Then one of the snails will bury herself in the dirt and lay the eggs. After 3 weeks-3 months the snails can hatch!