Place pork between two sheets of plastic wrap or parchment. Pound to about ¼-inch thickness.
Season both sides of the pork with salt, pepper, and paprika (if using).
Set up three shallow dishes: flour in the first; beaten eggs and milk in the second; breadcrumbs in the third.
Dredge each piece of pork in flour, shaking off excess. Dip into egg wash, then press into breadcrumbs to coat. Let rest on a rack for 5–10 minutes.
Heat about 1 inch of oil in a large skillet over medium to medium-high heat (around 375 degrees F) until shimmering.
Fry schnitzel in batches for 2–3 minutes per side, or until golden brown and cooked through. Transfer to a rack or paper towel–lined plate and season lightly with salt.
Serve hot with lemon wedges and parsley.