In Swedish, "snigla" ("to snail") is the female equivalent of "olla" ("to bellend"). That is, to rub your genitalia against some thing or another for mischievous purposes.

The snail connection probably comes from this old high brow joke only told in the best of chambers:

Q: Why do women have legs?

A: If they didn't they'd leave snail trails everywhere they go.

That's a thing?

under breath while pouting "I'll snail you to the wall..."

slug life.

Amongst teenagers before the omnipresent social media eye, yes. Kids today, no idea.

I didn't choose the slug life. The slug life chose me.

I love that they have words for these things I've never considered anyone might do

mischievous purposes.

What's the word for when it's innocent or good purposes?

Is this so common in Sweden that it needs a word? Two, nonetheless.

Or when it's a neutral, mutually beneficial tradeoff purpose?

Yes.

Rubadubadub da bud.

😏