Wow, there are way to many red flags going off about this guy already! This guy is bad news! Stay the hell away from him, and don't do business with him. Can someone else deal with him instead, a man ideally?

Is there anyone that you can report him to? I would if I were you. File a complaint with whoever you can, or whatever agency that you can. Save the emails as evidence. Whatever you do, don't meet this guy anywhere in person. Block his email if you don't have to deal with him. Tell him upfront that you don't find his jokes to be funny and to not send you anymore pics of a sexual nature, and to stop asking you for pics of you in a bikini or anything else that's suggestive in nature.

Keep on telling him to keep things professional and that you don't appreciate his comments. Tell him to go to hell or hang up the phone on him if you have to. Get all of his contact info in writing instead of the phone. He sounds very creepy and shady, and possibly dangerous. Again, do NOT even agree to meet him anywhere! It'd be foolish and dangerous to do so. Especially in a foreign country to where the laws aren't as strict about certain crimes. Have a trusted male accompany you in public if you can't avoid meeting him in person for whatever reason. Whatever you do, don't go to his hotel or anywhere secluded with that guy.