VIDEO: 'The Switch' Stars Discuss Donating Sperm vs. Blood

Leave it to MTV News to come up with a really tough red- carpet question to ask the cast of The Switch! Which gift of life is sexier to donate: blood or sperm? Jennifer Aniston, Juliette Lewis and Jason Bateman had to think about that one for a while!

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Since The Switch is about donating sperm, MTV News came up with an appropriate red-carpet question for the cast.

"I'd have to say sperm," Jen said. "It depends on your situation, I'd have to say."

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Juliette couldn't choose a side and said, "Both vital signs of life in this day and age."

And Jason had to give a lot of thought to his response!

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"Oh, boy! I think it depends on what part of the world you're in. Different parts of the world need different fluids," Jason explained. "Well, if I was in China, they wouldn't need any extra sperm. If we were in, let's say, Afghanistan, they might need some extra blood."

"I think here in America our fluids are tip-top," he concluded. "Thank god we live in a lucky place."

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Check out the rest of the cast's answers in the video below!