For those that don't remember Digimon Tamers: It was said, that Digimon aquire Data in different Ways, like eating some Medias, or even absorbing the Data of killed Digimon, to get stronger. And Semen is to put it simple: Biological Data. So this makes such actions, Canon-wise, a valid way to upgrade your Digimon. And the highest Version of the Digimon acquiring human Data was shown, when Gallantmon first appeared.