@exhausted I think you and I would get along fine over a beer but I'm going to have to respectfully disagree with your last post.
My last 3 ltrs had a very low mileage and were coming off long dry spells. Now I had been with all these girls for over 2 years so if that was just a story I would have twigged. And I worked out most of that from their friends over time.
Skill does influence the outcome. There have been master seducers all throughout history. This site is named after one of them. Any intelligent guy who has been here for a while should have at least an average degree of skill in the field.
I like to loosen the panties early as I like to get my return on this investment up front. Then mostly as she is not ltr material at least I've had some profit. It also avoids the friendzone / orbiter trap.
If you check out the old naughty Ninja thread it has some pretty good advice on qualities of a good girl. My current girlfriend exhibits all of those qualities. I'd also say you judge a on slut multiple red flags not just one. Of course your opinion may be based on religious beliefs in which case you are perfectly entitled to hold it but you shouldn't project onto others. I was raised Catholic but I follow the many mansions teaching now and my beliefs are probably more Eastern.