As title states, would it be possible to have both the same spent adress as change adress.

How it currently goes by default is that if you sent 10 bitcoins from adress A which holds 30 bitcoins, to adress C, 20 will be returned to a pre-generated change adress B.

Would it be possible to have both change and spent on A? So that these 20 will be returned to A instead of B?

And how would i do that?

— I know that this shouldn’t be something you should do because it essentially removes alot of “privacy”(Which is pretty deceptive anyway), however i was just curious if this was possible.

I’ve read countless articles, in which it came forward that this is purely done because of privacy reasons ( no visibility of pubkey), and does not really have a technical purpose. – correct?