How do I describe girl's arousal?

Wild title off the bat, but I'm writing a gift for someone, and I take my writing seriously, divorced entirely from whether or not it is a joke.

I was writing and realized, I was AMAB, so I have no idea what arousal feels like on the other end of the spectrum.

Are there any resources I can look into to subtly imply another girl became aroused without just saying "I got horny lol" (though that'd be funny, it's not very eloquent)