It's great when your client and you are on the same page and you can talk about everything, about family, unhappy love, the meaning of life, etc. But with new clients it's better to be careful and not discuss forbidden topics. Maybe someday they'll stop being forbidden.
So what topics it's better not to discuss with new clients?
Not everyone is ready to hold the cards (the wallet) open with the first stranger.
Severely criticize of the previous lash stylist's work
Of course, you can note some points that were done wrong but tactfully.
Severely criticize of other clients
And even the discussion of them. Otherwise the girl will think that you'll dish about her with other clients.
They're often interesting only to those who have them.
Don't discuss or judge your friends, celebrities or just strangers for their appearance, weight, hair, etc. To be honest it relates not only to communication with clients.
Who's right or who's wrong? Everyone has his own opinion about it and it's unlikely that you can change it.
It's even more serious. Any harmless joke or statement can hurt the client and she'll never come back to you.
Everyone has his own family situation so questions about it can upset clients.
What's right and what's wrong
The forceful comments about any topic can be inappropriate. You can not love to practice sports but the person before you can think in a very different way.
So it's better to focus on topics that your client talk and discuss them ;)