Why are anime people not drawn like you know regular adult people?

[Gingerbread Demon]

Because the freedom of animating means not having to adhere strictly to one style, or level of realism.

I like this answer the best. and Kawaii is a good answer as well. Cute always makes things nicer.

 

[Redfern]

I don't like anime, and until this I had completely forgotten seeing Marine Boy back in the 1960's.

I didn't like it then either.

Aww, don't be like that. I mean, it had a topless mermaid as the main character's girlfriend! True, she had strategically flowing locks of hair that forever hid the more, ahem, "intriguing" anatomy, but still...topless mermaid!

 

[Relayer1]

Aww, don't be like that.

I did mention seeing it back in the 1960's.

I'm way too old to be anything other than a curmudgeon...

 

[Gingerbread Demon]

Aww, don't be like that. I mean, it had a topless mermaid as the main character's girlfriend! True, she had strategically flowing locks of hair that forever hid the more, ahem, "intriguing" anatomy, but still...topless mermaid!

I saw it during the 70s/80s. Now what was her name?

Did Marine Boy have an actual name too?

Oh and that theme tune I know the words off by heart how sad am I?

 

[Skipper]

I saw it during the 70s/80s. Now what was her name?

Neptina (ネプティーナ)

Did Marine Boy have an actual name too?

Err... Marine? (マリン)

ETA: a more modern rendition

Spoiler: Slightly NSFW