A riot control agent is a non-lethal chemical used to disperse a riot. It can rapidly produce sensory irritation or disabling physical effects which disappear following termination of exposure. Examples include tear gases such as CS gas and CN gas as well as pepper spray.
... as a passage for sperm.
The external urethral sphincter is the skeletal muscle that allows voluntary control over urination.
In the human female, the urethra is ...