Reality is not always a factor when it comes to TV relationships. Actually, it usually isn't. Often, two characters that would never come together in real life are forced into a relationship for any number of reasons. It's not really a problem for most TV viewers because they understand that entertainment value will always trump reality.

That being said, there are some on-screen relationships that make perfect sense. Then there are the head scratchers. Below is a sampling of the latter. Please note, just because these relationships are unrealistic doesn't necessarily mean they ...

Happy Birthday to tennis superstar Jennifer Capriati (1976), "Xena: Warrior Princess" star Lucy Lawless (1968), Australian supermodel Elle Macpherson (1964), "Star Trek: TNG" actress Marina Sirtis (1960), Jane's Addiction singer Perry Farrell (1959), "Harold & Maude" star Bud Cort (1948), "Monty Python" actor Eric Idle (1943), legendary baseball pitcher Cy Young (1867; d. 1955), and 10th President of the United States John Tyler (1790; d. 1862).

Happy Birthday to tennis superstar Jennifer Capriati (1976), "Xena: Warrior Princess" star Lucy Lawless (1968), Australian supermodel Elle Macpherson (1964), "Star Trek: TNG" actress Marina Sirtis (1960), Jane's Addiction singer Perry Farrell (1959), "Harold & Maude" star Bud Cort (1948), "Monty Python" actor Eric Idle (1943), legendary baseball pitcher Cy Young (1867; d. 1955), and 10th President of the United States John Tyler (1790; d. 1862).