How can i tell someone there a bad kisser?

The Ninja: How can i tell someone there a bad kisser?
So i’ll just say it my girl friend is not a bad kisser just she is not that good Like she opens her mouth too wide (Of coarse this makes me have to open wider to adjust) and she uses to much tongue (like she goes too deep with her tongue)So how should i tell her Because I don’t want to offend her and I’ve tried to Show her during the kiss how she should do it but no luck So what are some tips i can use to tell her in a nice way. And give her some tips so she can improve

Answers and Views:

Answer by Gravity
By telling them.

Answer by Thomas
just say… “hey, i need to teach you a bit” but joke about it a bit

Answer by Martin
JUST TELL THEM TO THEIR FACE…