Well if you're all interested in this comic and more by the artist, Why not consider donating to his patreon if able? Clopplots/Knotted definitely could use more patrons and the money would go to continuing to make these comics and all the pictures he draws. Even $1 from you guys would be helpful for him. ^^ The tumblr is Clopplots and the link to the patreon is usually posted with stream posts every tuesday if anyone wishes to join.
From what I can tell from poking around the internet, semen has around 2/3rds the protein content of tofu by weight/volume (5g per 100ml vs 8g per 100g), but it's difficult to find exact numbers.