A couple agreed that whenever they wanted to have intercourse they'd say "Let's make a phone call"
One day the man sent his son to tell his mom while she was busy in the kitchen.
SON: Mom, daddy said you should come so he can make a phone call.
MOM: Go and tell your daddy that the network is busy.
DAD: Then tell her that I will go elsewhere to make the call.
MOM : Tell you daddy that if he does that, I will open a call center here!
Source: The phone call (http://akposjokes.com/joke/the-phone-call)
I'm very sure the father won't want to try that once he hears her last reply. I'm sure he still cherish their marriage!
Okay that phone call agreement is now ready to cause utmost disaster in that house. This one is just hillarious.