Why are most consitutionalists/libertarians social conservatives?

[Call of the Wilde]

I always hear these guys shouting, "Give us more rights!"..."We want the Constitution back!"

Of course, these rights they speak of pertain almost exclusively to the economy and right-wing social beliefs.

Now I understand the economy...libertarians believe in the free market. But on social issues, why are these people espousing conservative dogma? They're supposed to be libertarians, right? I thought they believed in freedom.

Should they're beliefs pertain to both the economy AND social issues.