I want to ask my wife not to kiss me when our 13yo daughter is around
Do you have a problem with this?
My daughter is still young. Kissing in public is not an appropriate practice for her to see
You seem very shy about showing your daughter your love for your wife, but she is probably not going to think much of it. It is better to show her how much you love your wife, otherwise she will grow up thinking love is not a part of marriage. Your wife woould also feellike she is being controlled way too much and hate it.
It's not about what my daughter thinks about but it is the inappropriate things.
Kissing is not inappropriate for a 13 year old. You can't lock her in a convent and never have her exposed to sexual things. She can access porn in like 10 seconds on the internet. Seeing you and your wife express healthy, respectful, loving affection will help balance out all that noise on the internet.