How do I stop guys being nervous around me because of my looks?

I like to present myself well - not full glam but I like to have a bit of sexyness in my day-to-day get up, to look nice; have my hair nails done etc. I also go to the gym a lot. In a lot of places I get lots of attention.

The problem is the majority of guys can't speak normally to me sometimes. They shift around, don't know what to say, and are just not natural! I just want to be able to have normal conversation with guys where I don't make them nervous. This is who I am, this is the way I dress - how do I get guys to just interact normally with me?
How do I stop guys being nervous around me because of my looks?
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