How to qualify a prospective son-in-law and see if he has the right stuff for your daughter? Ask him, “Are you a Communist?” and see how he reacts.
At the risk of sounding a little syrupy, I have to say one of the great rewards of being the father of daughters is hearing them giggle together late into the night.
You can always rely on those who know you best.
Sad fact: wherever you find concentrations of young men, expect a small percentage of adult men of authority looking to peel off the weak and confused and gratify their demonic id.