Can you not wear any underwear with gym leggings or is it unhygienic?

I love the look of scrunch bum leggings but any hint of underwear kinda destroys the look. I tried seamless thongs and g-string but it's not perfect. Probably no one will notice but it's bothering me a bit. I want to go just without underwear but it feels unhygienic even though I read that it's apparently ok. What do u think?

Can you not wear any underwear with gym leggings or is it unhygienic?
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