It happens a few more times, always with just the thinnest veneer of bro-y joking, until Xiao Zhan figures this is just a thing they do sometimes. Casual sexting among friends must just be something Yibo needs, and Xiao Zhan is selfishly glad he gets to provide it for him. He doesn't think about who else Yibo might have figured out as well as he's figured out Xiao Zhan, who else might get to do this with Yibo.