There's this guy I just started casually seeing - he thinks I'm a good girl when really I just haven't been given the chance to be bad. I want to shock him. If I went over one night in thigh high stockings, black lace bra and a garter belt with heels under a coat would it excite him? Guys give me your opinion!
That sounds disastrous. What if he likes good girls? If you want to have sex with him, you can be subtle about it and wait for him to make the move. Keep your garter belt, stockings and lace underneath your outfit.
Casually seeing... have you had many dates? That sounds hot and it will no doubt excite him :) I personally wouldn't think you were a slut and most guys would love it. I say go for it! I'm sure most guys would agree.