Old Math Professor

A college math professor and his wife are both 60 years old. One evening the wife comes home and finds a note from her husband. It says: "My dear, now that you are 60 years old, there are some things you no longer do for me. I am at the Holiday Inn with my 20-year-old student. Don't bother waiting up for me." He returns home late that night to find a note from his wife: "You, my dear, are also 60 years old and there are also things I need that you're not giving me. So, I am at the Motel 6 with one of your 20-year-old students. Being a math professor, I'm sure you know that 20 goes into 60 way more than 60 goes into 20. So, don't YOU wait up for ME."

Paddy's Mother-in-Law

The mother-in-law arrives home from the shops to find her son-in-law, Paddy, in a steaming rage and hurriedly packing his suitcase.
"What happened Paddy ?" she asks anxiously.
"What happened!! I'll tell you what happened. I sent an email to my wife telling her I was coming home today from my fishing trip. I get home... and guess what I found? Yes, your daughter, my wife Jean, naked with Joe Murphy in our marital bed!  This is unforgivable, the end of our marriage. I'm done. I'm leaving forever!"
"Ah now, calm down, calm down Paddy!" says his mother-in-law. "There is something very odd going on here. Jean would never do such a thing! There must be a simple explanation. I'll go speak to her immediately and find out what happened."
Moments later, the mother-in-law comes back with a big smile. "Paddy. I told you there must be a simple explanation .....she never got your e-mail!" 

Paddy's Curtains Are Open

Joe says to Paddy, "Close your curtains the next time you're shagging your wife. The whole street was watching and laughing at you yesterday."
Paddy says: "Well the joke's on them stupid bastards because I wasn't even home yesterday."