An old geezer visits his doctor for a routine check-up and 
 everything seems normal. Then, the doctor asks him about his sex
 life.
 
 "Well..." the man drawled, "not bad at all to be honest. 
 The wife ain't all that interested anymore, so I just cruise 
 around. In the past week I was able to pick up and bed three 
 girls, none of whom were over thirty years old."
 
 "My goodness, Frank, and at your age too," exclaimed the doctor.
 "I hope you took some precautions."
 
 "Yep. I may be old, doc, but I ain't senile yet... I gave 'em all
 a phony name."