Having mouthwash ready is very important IMO. I usually carry breath mints but sometimes i forget and run out of them. it's a life saver if the lady has mouth wash.

Unscented soap also helps. Some guys don't like using girly smelling soap. Some guys have SO.

Some fresh new towels cuz we don't like to use old towels that other guys have used, especially if it was used to wipe off after the other guy's you know what...

Having plenty of condoms come in handy too, as funny as it sounds LOL  I had a case where a lady ran out of em. We weren't interested in engaging in BBFS so I went out and got some, 20 minutes delay in the action.

ps: Rash cream, pregnancy tester, enima, and a full dose of Amoxicillin also helpful for the guy in case he forgot that he came to the incall with a bad outbreak.... LMAO!   j/k

Fresh towels, and mouthwash is good.

Yes it matters

I love it when it looks like a lady has prepared for my being there... little things like this go a long way in setting an impression that will last in a clients mind.

Your mouthwash may not be used extensively..... I keep a bottle in the car normally shower 5 minutes before I leave the house or work to see a lady.  But its nice to know that once I get there IF i need to freshen up .... all the necessities are there.

Room to dress and move around is also important to me.