Two older men are sitting on a park bench talking and one of them asks the other about his sex life. The man answers that he has an excellent sex life and is still very active.
The other man confesses that his sexual appetite has greatly diminished with old age so he asks the other man if he has any secrets for staying sexually vital.
"Well," answered the man, "I eat rye bread everyday. That is my secret. If you just eat rye bread, your sex life will improve dramatically."