@Ill_Will7

My question is this... Is it natural for a man to live with a woman?

Wrong question. There's a lot of shit people do that isn't "natural." We do it anyway because we've learned through various means it's the most efficient or simply the least problematic way of handling a given issue.

There are a lot of practical reasons for a man and woman to share a home. Most of them have to do with raising a family, which doesn't apply to you. Still others, per @Kloi's response, are grounded in the complementary natures of the sexes. That's probably pretty close to the ideal for a single man who's not interested in having kids but, as noted, you're well advised to have an exit strategy for if/when she decides it's Time to Get Serious. Also, per @Typo-MAGAshiv's response, simply finding such a woman in the first place is something of a losing proposition in most western cultures.

Ultimately, if you know you don't want children and don't want to cohabitate, you're probably just going to need to resign yourself to finding a new girl every X years. Keep an eye out for the good ones, to be sure, but don't count on actually finding one. It sucks but it's the nature of the beast.

@Vermillion-Rx

It's possible they're actually good girls and, if so, it would stand to reason none of 'em really know any rampaging turbosluts. "Birds of a feather," and all that.

Ain't saying it's likely, mind, but it is technically possible.

Far more likely is she and all her friends have their own share of closet skeletons they've convinced themselves don't count Because Reasons.

My high school girlfriend married the guy she dated after me. At the time, she could have honestly told him she was a virgin. She could not have told him he was the only man had ever seen her naked, nor that his was the only cock she'd sucked. Were she so inclined, however, I suspect she'd have little trouble convincing herself all the fooling around we did didn't count because it never amounted to actual penetrative sex.

I'm not saying I know or even suspect that to be the case, just illustrating the point.