What is so odd about odd numbers?

They never get in pairs. So they lack evenness, and that IS odd.

If you are a very special odd number, they call you Prime. I like 163. The only even prime number is 2 and that, to me, makes 2 a very odd number indeed.

As you cannot make pairs, there is always one whatever left over that is part of neither half; the odd one out.

Odd has ancient origins meaning something that sticks out, much like we would say conspicuous

3 never changes his underwear, and voted for W (twice !! ).
5 only bathes in January
7 (shit…..don’t get me STARTED on 7)
9 is “No” in German

…...and you ask are they “really odd”.....( pshhht…I mean, come ON….)