"The Fireman" joke

A fireman came home from work one day and told his wife,
"We really have a wonderful system at the Fire Dept."
Bell 1 rings, we all put on our coats.
Bell 2 rings, and we all slide down the pole.
Bell 3 rings, and we are all on the truck ready to go.
From now on we are going to run this house the same.
When I say: Bell 1, you strip naked.
Bell 2, you jump into bed.
Bell 3, we are going to make love all night"
The next night when he came home from work and yelled:
"Bell 1! She took off all her clothes.
"Bell 2!" She jumped into bed.
"Bell 3!" They began making love.
After a few minutes she yelled "Bell 4."
He said "What the hell is Bell 4?"
"More hose" she responded, "You ain't nowhere near the fire."