I agree with you that slut does not have to be a negative word. That's an entirely different conversation however.
I do believe the danger in your statement lies with your naivety on the reasons women wear make up and your use of over generalization. Allow me to explain and please take note I am open for a discussion - NOT an argument, let's throw out any potential use of troll like behavior or demeaning comments shall we?
1. Saying: "all, always, never, none" are very easy ways to throw out your argument, however valid and worth elaboration it may seem to you (I personally do not find it valid but that's regardless for this particular point) as invalid to the opposing party. It articulates a poor grasp on the reality of the subject matter and an inability to look at things wholly. As most situations, this one included, rarely justify their use.
THAT said, I'd like your resources, if any on the association between the rise of make up sales and broken homes.
2. I'd also like to mention that the institution of make up has been largely perpetuated by our male counterparts, meaning that would imply in a patriarchal society that men want to look at WOMEN as sexual objects, not the other way around. Holding women to ridiculous beauty standards and normalizing these standards is a method to still confine women and limit them since the boom in women leaving the home for work and the end of the typical 50's housewife. I don't have a qualm as much with sexualization as I do objectification and it's this type of objectification that emotionally cripples women who can not escape the reach of the media, images of women held to these standards are everywhere, and it weakens us. It was intended to.
Now, I am all for wearing make up and feeling empowered and I think that this does not have to be a sexual thing. It can be, very easily, but it isn't always in my case and since I am a regular human girl I assume I am not alone in this. It's fighting fire with fire. It means having these things super imposed on us, without our choice, does not necessarily mean I would not have had the same aesthetic for it originally, especially as a creative type.
I certainly don't feel like this means I want to be looked at like a sexual OBJECT, I may want to be looked at sexually by certain people (just like some males, with or without the use of cosmetic aids do.) but it doesn't warrant the objectification of everyone, or their approval.
If you are interested in the mindset and history of all this from a female perspective, I suggest reading The Beauty Myth by Naomi Watts...I believe? I don't agree with ALL that's written within it but if you do take pride in respecting people and accepting them for what they are (hopefully as individuals, not predetermined stereotypes) it'll offer a unique insight into a world and a problem that as a man, you are, by definition - immune to.