I've only got one tentacle and can't deal with these unrealistic body expectations of having many tentacles.

John K and Peta definitely fit the bottom image.

Source of the anime?

If I want an accurate depiction of the human body, I wouldn't be watching a hentai, would I?

full on fantasy with 5 dicks is fine, but when a character is drawn realistically and apparently their spine is twice the lenght because the artist wanted to show both their ass and their tits as they're getting fucked is honestly a turn off