Is it normal to touch my buttcrack with my hand then smell it?

I recently shared something really personal with the women's empowerment group I go to every Tuesday and the subject of how I am secretly gross at home came up. One of the members said, "I don't even want to know" and I just laughed it off. Not that I would admit to my gross habits anyway.

So, I have a couple of habits that feel very natural and normal for me to do, but at the same time I am aware that they are gross and most likely frowned upon. These habits include:

Picking my nose
Rubbing my fingers together to drop boogers after I've picked my nose
Touching the crevice of my butt with my hand then sniffing said hand

I put those habits in the order I feel escalate from the more normal and more tolerable/accepted gross things to the more disgusting and less accepted.

Surely there is someone out there who does this too.

Also, I want to stop but so far I haven't taken any measures to do so.

One more thing, I sometimes "discreetly" pick my nose (more of a scratch) in public if a booger is there and bothering me, but I am more conscious about it when there are people around who aren't my family.