How to turn on your boyfriend over text.?

My boyfriend and I have a long distance relationship and were not really as daring as getting into big details but he tells me that he wants to pin me down with his arms and kiss and lick every inch of my body and, I just don't know what to say to him without.. Scaring him xP lol thank you! :) btw: everytime I tell him what I wear to bed he gets aroused REAALY aroused ;) but I just want him to be like on the verge of screaming aroused :) thanks