How to respectfully sexualize a nice text conversation?

So, I am talking with this girl on Tinder.. Perfect match, lots and lots of things in common. A dream girl.
But I face some hard time making a more serious investment. I never asked for nudes in my life, although my ex girlfriend and one other girl sent me in the past without the need for me to ask.
I don't want to be perverted, but I also want to be able to have a more adult thing with her.
How to respectfully sexualize a nice text conversation?
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