Well I guess rape would be considered involuntary but then I wouldn't consider it sex even though one could get pregnant - which to some loons is gods gift to women.
So if we take your argument to it's logical conclusions (if you can understand logic or reason) because you think sex is an voluntary act you are obviously saying that sex within and between the same sex should be outlawed then they should not engage in sex because sex is only voluntary.
Now then tell me what the hell has sex got to do with marriage? Many people have sex with many other people before marriage and during marriage. Is sex all there is to marriage to you? That is sick.
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