Bigger must send following photo based on difference
0.1-0.2: Shirtless
0.2-0.4: underwear only
0.4-0.6: naked butt
0.6-0.8: frontal, soft dick, no face
0.8-1: frontal, hard dick, no face
More: all of it
If bigger does face, smaller have to donit too, but face optional