They are produced by several organs in both sexes, may be converted into one another, and can have varying effects in different species, sexes, and individuals.
In either the male or female sexes, they are produced, and by several organs in both.
Only males produce them, and they are the only species of their kind to do so.
Two males are standing.
I'm always moving around and I can never wait to move.
The team is in a huddle.
a dog is sleeping
I am confident that they are ready for the hearing.
A man rides his bike.