During exams Dosti sms

During exams
.
.
Dost Barabar likh rha hai..
.
.
2nd frnd continously saying, ''Kutte kuch bata de''
.
1st frnd Reply:" Mujhe khud kuch Nahi aata hai..
.
.
.
.
2nd frnd's Ultimate Answer:" Toh apne baap ko luv letter likh raha hai kya ??