How about beginning by asking if he’d feel at ease being expected away by a female? Then if he responds favorably, ask then.
Additionally, in the place of welcoming him to surf/swim/movie, think about coffee beverages and a walk in a park? Or simply just fulfilling for coffee at a coffeehouse. It might be reduced stress. However in situation it goes perfectly, make an effort to have a basic concept for another thing the two of you could get do following the coffee.
Regarding cock photos, any man whom delivers you one is Mr. Incorrect, Wrong, Wrong, then even more Wrong, therefore at the very least he’s saved you some wasted time.