I'm having this problem with girls I meet with the sole intention of having sex with them. I say stuff I shouldn't say because I want to get laid so I end up giving them the wrong impression about my intentions and I also like to joke a lot but in a romantic style, which works great, but maybe causes undesired effects in the long term. Today I had a VERY uncomfortable situation and I need to put an end to this. What should I change? How do I keep it purely sexual?