You should make a lot of hot sounds. And you should make horney faces. Also, you could dress up really sexy and start to strip in front of the man. The man could also lick your croch.
How To Get Excited While Doing Sex?
You have to live out your fantasy's as best as you can,try new things,dress up,give massages,etc.what ever may turn you on do more of it.
One why is if you want to get excited while having sex stick his dick in your mouth. That will turn him on.
Get your knob out and wave it out over a poppy field
If you have to ask than your probably with the wrong person or its the wrong time.