Of course nobody should touch anyone without their consent, but I think we have to acknowledge that in the world we live in, men are doing a lot more of the harassing and dick pic sending, often with much more serious consequences. Women sending unwanted vulva pics is not a real thing, and it's not really useful to redirect the conversation.
Laws should address online harassment, and some places have already made progress. While it's not necessarily ever going to be a huge law enforcement priority, the laws do help tack on charges when someone is exhibiting many forms of aggressive behaviour. Just like public drunkenness or loitering laws exist, but are not used unless you are also breaking some other law or being a nuisance.
If men knew they could be charged, or even if social media platforms enforced their own rules and deleted accounts that sent harassing pictures, it would help. I've reported pictures that threaten rape, and FB's response is basically " this doesn't violate our terms and conditions, if you don't want to see content like this, just block that person". It's pathetic.