Hmmm Let me think of a feww....
Friends - Joey/Pheobe
Eastenders - Ian/Roxy/Christian/All the Masoods (OMG the sex scene thing!!!

)
Futurama: Dr.Ziodburg ( Sp? )
American dad - Roger ( He's the best thing about AD imo lol )
Family guy - Stewie/Peter/Meg ( Its funny when there like mean to her

)
I will think of more as others do them. It might get my brain working lol.