Phil is telling guys in their 20s to find a 15-16 yo girl because at that age, they are more likely to believe the bullshit coming out of a guy’s mouth. To him, younger = more obedient. A single woman in her 20s is more likely to know better.

His line about asking the parents for permission is just his way of trying to weasel out of saying out loud that rape is a-ok with him.