Why does my boyfriend want me to dress sexy?

Anonymous
When we go out this weekend he wants me to wear the dress he bought me. I normally wear pretty modest clothes, nothing too tight or showing too much skin, but this dress he got me is basically a tube top that covers my butt. He told me he thought it’d be a nice surprise and since I have a nice body I should show it off more. I’m confused, don’t guys usually want their girls to not show too much of their body?
Why does my boyfriend want me to dress sexy?
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