"Roses for the Wife" joke

Rufus bought his wife Lula-bell a bouquet of twelve long-stemmed roses for her birtday. Lula-bell gave him a big, close, hug and a long, deep, kiss. Then she wispered in his ear "I guess I'm just gonna spend all night on my back with my legs in the air." Rufus thought about it for a minute, then said, "You don't have to do that, honey. I bought you a vase to put the flowers in."