Many thanks for your patience. The first thing you should bear in mind is that just because he has said he had done this does not mean he actually has. He may have said it to try and get a reaction out of you (whoever he thought you were), to make it sound more sexually appealing, say with a degree of dare and danger in it and so on – you know what I mean. So unless he puts his hands up and admits it once challenged or there is more credible evidence to back such allegations up, it could just be hearsay, even if he had said it to start with. SO your concerns are valid and he could deny it all and claim it was just a joke or done to get a kick out of telling such a story or to get a reaction out of you.
You have not done anything illegal really so do not worry about that. It is not entrapment, this is a much more serious matter where the police use deceitful methods to try and make someone commit a crime and then charge them. You pretended to be someone else, in itself that is not really a serious issue, or an unlawful issue at all, even if it resulted in someone admitting to a potential crime or act of misconduct. So do not worry about any legal repercussions.
Whether you go to the employer with this is really u to you – no right or wrong answer here I’m afraid. There is no duty on you to report this, unless you had a specific policy requiring you to. This is a moral call more than anything else so the final decision rests with you. I have explained the legal bits and nothing in law would tell me to advise you that you must go ahead and report this so this is something you have to consider.
I hope this has answered your query. I would be grateful if you could please take a second to leave a positive rating (3, 4 or 5 stars) as that is an important part of our process and recognises the time I have spent assisting you. If you need me to clarify anything before you go - please get back to me on here and I will assist further as best as I can. Thank you