Q: Do you think i need makeup?

Come on. Isn't it obvious no woman wants to be told that she's only pretty when caked up with cosmetics? Don't use the question as an opportunity to 'be honest' with your partner and scrutinize her physical pros and cons. And most certainly don't try an evasive answer like 'well, your skin is gorgeous but don't even think about dropping the eyeliner, you look like a ghost without it!' 

The answer? Something simple and not outright dishonest. You want to make her feel that she's naturally beautiful and completely comfortable in your presence.