How do I look sexy?

Make up your eyes real pretty, eye lashes, mascara, I love sexy eyes.

be romantic and be you're self ,i'm sure you're sexy

shes right talking is key but if you don't have time lingerie is always sexy but go with something you like to its not all about him

go to fredricks or VS.

Tight, short, black and/or red! Work with that.

If yall have been together for a while, there should be no reason for him to think that you are trashy because you want to spice things up a bit. Maybe try something a bit subtle (like some cute lingerie) tonight and see how he responds. If he seems to really like it, then amp it up on future meetings. And if anything, talk to him and see what he's into. Communication is key :)

I don't really think you can go wrong in this department. Guys love this kind of thing ;)