Approach

Hello Everyone,
I have been looking to play with a nice clean cock since few months. Looking for someone mature, easy going and about 50mile radius from me and strictly NSA. Talked to a few lovely people on Xham but they all are so far.
Its hard to find someone to play NSA or other wise.
I am thinking about approaching somebody and asking them if they are ok if I suck their cock. But we all know the doubt. People may think you are weird and reject the proposal and more over complain to somebody and humiliate.
Is there any signs by looking at somebody we know that they may be interested in being their cock sucked beyond doubt?
I would think there are quite a few middle aged men that are not getting oral at home and love to feed me their clean cock.
Moreover, if there aren't any ..may be its about time we figure out a secret sign that tell group of people around us in public such as a store or parking lot of a restaurant that we want our cock sucked. any simple sign such as tilt of a cap or the way we smile or look.
I hope I am clear about my message. Please feel free to ask me any questions you have or suggestions.
DDF, discrete and NSA here. Please be same.
And as always, Thanks for reading.