Bra is showing, sexy or slutty?

So I have some pieces of clothes, which are either slightly transparent (or white) or have e. g. a cut-out back.
So I always try to avoid showing my bra, but sometimes its inevitable.
What do you think about seeing a bra through a shirt for example?
And if, would you rather prefer the woman to wear a plain bra or sth. with lace?
I am quite fit and skinny by the way, so not fat bulging anywhere.
Updates
+1 y
Wow, I am actually amazed about all this positive feedback. I guess I was worrying far too much about it. Thanks a lot :-)
Bra is showing, sexy or slutty?
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