It can be tricky depending on the friend and their level of openness generally. I found it easier sometimes when I told others I am a nudist. Would often open doors to conversations we may not have had previously. By being honest and clear would allow anything that might happen to happen more naturally and be less intimidating for the other party.
 
Please keep us updated.

I have a very good friend whom i would like to share a session with. We have seen each other dicks at the urinals a couple of times. But not in the locker room or other situation since it is not common for people in my country to be naked in certain places.

hope it worked out well with you two.