@AFresherPerspective
1. most likely scrying magic, unless they didn't just ask for directions or something xD
2. Because the MC is actually pretty stupid, and extremely arrogant. ( and because fight scenes are cool hurr durr )
Why bother trying to talk down people if he can just beat them down in less them and get the same result.
Really tho, the biggest reason is because the MC thinks with his di*k and not his brain 90 % of the time he sees a pretty woman.
And because he doesn't want to give up his really cool sword...
3. Actually yes!
Because MC is such a huge wanker he did not actually bother explaining the fact that he is not being possessed by the sword.
Granted they might not have believed him, but as it stands they think he is possessed by the sword and with his power he is a threat to the kingdom if not humanity as a whole if he were to be possessed.
@Siikalahna
4. Well we don´t know for sure if the magic would work or her or not.
But regardless off how it works, its always a better option to use the grunts as target dummies as they are easier to hurt unless the spell doesn't work on her. ( drains the magic faster )
She most likely is far stronger then them after all...
Besides as much as it pains me ( ok that might have been a lie, I really don´t care too much ), it's actually better for the MC and the story as a whole if he does claim her as his woman.
The MC can barely think for himself when his donger isn't dictating his every move, so some extra woman might add a few extra brain cells to the mental capacity of the group as a whole.
Not to mention as a holy woman she does offer a very different perspective on life than his other girls...but really that is all just an excuse...
The real reason is that we can´t have the "hero" of the story going around hurting women, that would lower the ratings of the manga and make readers less interested.
(it's not that kind of genre after all )