Would you pledge your virginity to your father?
Father Knows Best
Can you really expect a four-year old to stick with it when she reaches sexual maturity? I'm not really thinking the onset of puberty, but older when she decides she wants sex. Maybe she will wait until marriage, but what if she doesn't. Should she be made to feel guilty for breaking a vow that was made before she understood the concept of this kind of vow? Even 13 & 14 year olds may change their minds as their cognitive capabilities change. Save yourself for marriage if you want, but do it for yourself, not because someone has pressured you into it (of course that goes for the opposite way too).
I have nothing against girls choosing to make this decision for themselves, but having your father choose FOR YOU?!