Why Jessica Simpson's father hated her wedding

Rich Cohen, author of the much discussed Vanity Fair feature on Jessica Simpson, explains the pained look on Jessica father's face as he watched his daughter walk down the aisle to give up her purity ring to a member of a boy band:

As it says in the Bible in [sic] re marriage and parents: leave and cleave.

Cohen also suggests that Joe Simpson was pained to see his daughter's value as an object of sexual fantasy diminish. But that's not biblical...