She said her family doesn't allow social media though? So, pretty much just line (which she said she had a hard time interpreting and conveying the message) and other similar app for direct contact, probably.
Discussing licking chocolate off their body: perfectly okay.
Asking for her number: absolutely mind-breaking.
They're probably going to start their relationship with some brutal BDSM bad-dragon-dildo pegging sex, then steadily progress into more bold ventures, such as kissing and maybe even hand-holding.