Jaskiers never been close to someone who gets injured as badly, or as often, as Geralt. and hes never been close to somone who knows what its like to be injured as well as Geralt.
He knows that when he kisses a bruise, the pain goes away - and bleeding wounds often aren’t as dramatic as they first seemed before he kissed them. But thats just how kisses work, right? thats the whole point of “kissing it better” - it hurts less when you are cared for, and once you’ve calmed down you’ll see there was nothing to panic about anyway.
But Geralt knows somethings up. When he’s injured he knows exactly how badly, how painfully, and how long it should take to heal. what he doesnt know is what the fuck Jaskier is and what the hell he’s just done to him.
Jaskier is adamant that its just because nobodys ever kissed him better before - which is tragic, and he will definitely be changing that - so the moody “emotionless” witcher just needs to believe in love and being loved.