We would like you to assess the QUALITY of each of the following argument (discussing Gay Marriage) and determine if the argument is Valid or Invalid. A valid argument is clearly interpretable and either expresses an argument, or a premise or a conclusion that can be used in an argument for the topic of gay marriage. An invalid argument is a phrase that cannot be interpreted as an argument or not on the topic of gay marriage.

Q: Churches and other religious bodies are free to espouse what they choose, and people are free to believe as they choose about same-sex relations and marriage, and they are free to believe that such relations are sinful.

A: Valid
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Q: In either case, it is a weak argument for the RC being anti-gay, since homosexual sex is just one of a hundred or so "risk factors" that disqualify one from donation.

A: Valid
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Q: I have read that straight men get get excited by watching two women having sex together.

A:
Invalid
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