Shaving your pubic area just before a session is not safe. Do so a day or so before a session. Shaving creates microcuts that can transmit fluids between you and a sexual partner.
Same with brushing your teeth/flossing. Flossing should be at least 2 hours before a session.
Show up clean, take a shower and get cleaner. Clean your ass. Do it again. And don't forget your foreskin, no cheese, please.
Be friendly, if that's your way, be shy if that's your way, just try to be natural.
And whatever happens, if the lady says 'no', 'softer', 'slowdown', 'no finger there', then you do it.
You pay, but its still at the discretion of the girls.
If you have 'particular' needs, ask first. Don't surprise them.
Warn them when you're coming, so they take it where they are comfortable.