I've never given my wife a French Kiss and she still married me with out any tongue sugar. 
A french kiss is a great way to arouse her however by stimulating her lips mouth and tongue
But what about bad breath? Bad breath is a big turn off!
Yes halitosis is a real problem when kissing, but sometimes breath mints or brushing your teeth can help with the odor
It's my my breath it's hers. Should I just wait until she come at me with a kissy face and throw a tic tack in her mouth?
Tic tacs can help but i would recommend you encourage her to practice good oral hygiene instead
I've been trying but telling my wife she has bad hygiene is a good way to get my self in trouble. But people have been French Kissing for ever I want to try it. 
Just get in the habit of always eating tic tacs yourself regularly and offering her some!  The little boxes are easy to carry
Thanks, I'll try that. 
Yes there are many flavors of tic-tacs - surely she will like some!  It is funny however that in some countries they color the box instead of the mints