Why DO we suck a cock and lick a clit?

What is it that makes us want to put our mouths around them and lick/suck/otherwise orally play with and tease them?

Other animals don't do it (OK, a monkey or chimp might, but even then ONLY their own - not another's - and only 'cuz they can).

i dont do either but girls suck my dick cuz it feels good and its a nice thing to do

cuz they both are delicious

one word: pleasure

i agree that biologically, there is no need for it, but because humans on the whole tend to have sex for pleasure, oral sex is a good way for this.

it is another way to get intimate with your partner, as well as allowing both of you to take the dominant role. Visually, it is very arousing to see your partner dedicated to giving you pleasure.

because they are there.

All I know is, how often have you refused to eat something, cuz it looked so bad?

It's taste is irrelevant. It looks awful, so it don't go into your mouth. Period.

Pussies are ugly (I love them, but they ARE quite ugly) and yet I (we) love them.

Penises are ugly (I love them, but they ARE quite ugly) and yet I (we) love them.

WHY are we (I) so driven, then, to put them into our mouths and seek to draw their very essence into ourselves by sucking on them like a babe on the teat?

Licking pussy and sucking cock beats intercourse, even, for me.

I can orgasm purely by doing that.

Why?

I like to see the other person enjoyin themselves. Thats my drive. And cause I want it back too..

Conditioning.

To elaborate, you say you receive great pleasure from doing it. Well, there you go, that's why you do it, it gives you pleasure to pleasure someone else. You see that vag or dick and your neurons start firing away like "if i suck or lick this, i will receive pleasure" so you do so. You have probably at some point seen a piece of food that looked gross but gave it a try anyway, just like with oral, but it turned out to be an unpleasureable experience, so from then on, your brain says "this isn't going to give me pleasure" so you dont eat it. Whereas when you starting giving oral, you became aroused and your brain and body received pleasure from it, thus conditioning you to like it. And then there are people who do it because they think the other person will do it to them. They may find the act gross, but also think that pleasure will come afterwards. Think back to Pavlov

The thought of a quid pro quo situation does not exist with me.

I lick and suck because I want to and get off on it. You don't even have to touch me, let alone suck me. I'm happy having licked/sucked you.

It can't make babies, so Mother Nature ain't involved, so WHY do I love performing oral so much?

Good question, it's probably a thing of nature. The reason why I think this is because we don't learn it at home to suck dick and lick a clit. Okey, this days with internet you get this ideas, but in the early days when there was no internet, people did it too.
So I guess it's nature to being that intimate with each other. Just like the animals who smell the genitals first...

interesting. i never really thought about it before.

i love pussy in my face though

Instinct I guess. Plus over hundreds of years people passing down the message that oral sex is actually quite good and helps stimulate your partner for actual penetrative sex to which leads to passing on your dna onto the next generation.