A guy I went to school with keeps sending naked photos to me. Last night it was ‘have I ever told you I fancy you?’ With a photo holding his penis. And then a few hours later in the early hours a photo of him using a flash light. And he put ‘best invention ever’. I’ve now blocked him but I haven’t seen him in years and find this concerning behaviour. Is it illegal to do that kind of thing? Plus he is nearly 30, it’s very weird