It depends on the context and the specific rules or circumstances within the manhwa. Sometimes it might be allowed, but other times it could be prohibited.
Finding the raw version of 'May I Touch It' manhwa is feasible. You could try looking on international manhwa platforms or even on social media groups focused on sharing such content. But make sure you're accessing it from legitimate and authorized places to avoid any legal issues.
As a fan of web novels, I'm interested in the emotions and psychology of human characters, not their physical strength or physical characteristics. But if I have to answer your question, I can say that for someone who breaks a bone at the first touch, this scene is very disturbing and heartbreaking, so it may touch people's emotions. The weak girls in anime with zero physical strength might remind people of those who needed special care because of their weak bodies, thus attracting sympathy and attention. But no matter what kind of character it is, we need to pay attention to their emotions and psychology, not just their appearance or physical strength.
We can use simple stories. For example, tell them about a little bunny. Good touches are like the bunny's mom nuzzling it gently. Bad touches are like a fox trying to grab the bunny in a rough way. Then ask them how the bunny should feel and react.