People worry about work meetings with a single person of the opposite sex present? Weird. In my part-time freelancing, I've had meetings and lunches with female

People worry about work meetings with a single person of the opposite sex present? Weird. In my part-time freelancing, I've had meetings and lunches with female clients and never felt any sort of tension or discomfort. Maybe because I'm the one doing the "selling", but the thought of hitting on these women while we're trying to negotiate a deal seems completely unprofessional and off the table. Don't people understand that "don't shit where you eat" means you can still do your job effectively?