What app is best for sending nudes?

Viber. Viber will color code all of your chats based on how secure they are. Green means any playful zingers you send are encrypted with a trusted contact, but red will flag if theres an authentication issue with the other party. You can also send messages that will self-destruct, perfect for nudes.

What platforms does sexting occur most often?

Traditionally people used SMS to send explicit text based messages, but with the recent boom in social media use and image based platforms such as Snapchat and Instagram – sexting is now more commonly associated with social media use.