That chart is way too complicated.
Netorare: NPC woman cheats on the MC, behind his back. NPC woman gets seduced by NPC male or cheats of her own free will. MC eventually discovers this and responds in various ways; willingly liking it, reluctantly liking it, hating it.
Netori: NPC male seduces and fucks the MC's women, thus the MC is being NTR'ed.
Netorase/Stag: MC tells his women to fuck other men, and either chooses to watch or not.
Swinger: MC tells his women to fuck other men, but MC fucks the women of these other men as well. It's often an equal exchange of women between couples.
Cuckold: MC gets aroused by watching his woman get fucked by better men. He accepts this or hates it, but always gets aroused willingly or reluctantly. MC is rarely in a position of power when he's getting cucked.
Cuckold Humiliation: Like the above, except the MC is also humiliated by either the dominant male, female, or both.
This is probably the best explanation of each term. I challenge anyone to show me a better explanation guide; because I genuinely want to make sure I got it right!