Riddles and brainteasers!

And I dont want the polar bear one. Please list them

a family went out fishing
there were 2 dads and 2 sons
by the end of the day
each one had caught a fish
however, there were only 3 fish
how?

well

there is a grandpa, a dad, and the dads son

*Grandpa* - Grandma The grandpa is the father of "dad" 1 dad
/
/
/
*Dad* - mom "Dad" is a son of grandpa and a father of "son"
/ 1 more dad and 1 son
/
*son* 1 son

as you see there is 2 sons and 2 dads

and only 3 people

A man need to cross a river. He has with him, one fox, one chicken and one bag of grain.
The boat he has can only carry him and one other item at a time. If he takes the fox, the chicken will eat the grain, if he takes the grain the fox will eat the chicken.. how does he get all his cargo across the river?