He has promoted Viktor Orban’s pro-natalist policies in Hungary, which offer paybacks to married couples that scale up along with the number of children…
Let’s stop beating around the vice-presidential bush: While Kamala Harris’s choice – probably Tim Walz – is a mild-mannered older person with two kids, Vance “The Lance” is a raging bull with three kids in quick succession and certainly more to come, if he takes seriously his pro-stiffy convictions.
Pragmatically, after all, the central pillar of anti-IVF natalism (no techno-cheating!) must be what Morrissey, winner of the 2015 Bad Sex in Fiction Award, dubs one’s “bulbous salutation.” Absent a willingness to scale up the “large pink prong,” as novelist/critic Edmund Wilson called his, there’s not going to be any other form of scaling up, Hungarian or what have you.
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A Trump/Vance pro-natalist presidency would perhaps feature graphic encouragement to men along these lines… So for instance take this Pyongyang poster:

Lose the Korean writing, and alter the exploding shaft to look more like a phallus, and imagine this image flashing at you day and night in the middle of Times Square. That sort of thing.