Ridiculous.

Olive oil has about 120 calories per tablespoon. Calories measure energy content - you can stick a wick in olive oil and burn it like a candle. If a tablespoon of semen had 25 times as much energy content, it would make a pretty good rocket fuel, or maybe explosive.

It's closer to six calories per teaspoon.

BTW, an adult daily diet is typically 2000 calories or so. Teenage boys typically masturbate 5-10 times per week. That would mean 15,000 to 30,000 calories per week, which would have to be replaced in their diet. In other words, and boy (or man) wit reasonably active sex life would have to double or triple the amount they eat.