The trouble with sending nudes is that it’s difficult to control their dissemination once you send them. Sending nudes between two consenting adults is generally fine, although if distributed vengefully, as sometimes happens between exes, you can sue for harassment. Sending XXX pics, solicited or otherwise, is a severe offense in all 50 states if the sender or receiver is underage - even if the person in the images is an adult.
Whipping out your junk in public to someone nonconsenting is a crime. The line between what is allowed and disallowed in sex is drawn at consent. Some guys like anonymous sex and will meet up from a dick pic - no face needed. Send one via Grindr and you may get blocked. Unsolicited XXX pics are the subject of endless debate.
