I haven’t run into the problem of people not being able to use a mouse - but I’ve found that very few young people are able to tell if something is saved on their own computer or being accessed over the internet. Saving or downloading files is not something they are familiar with. (Which I suppose is because a lot of modern software makes cloud stuff so silky smooth that people don’t notice it.)
I use to think about this a lot, and would constantly try to fix it - trying to look like I wasn’t just playing with my dick while doing it.
But now that I’m older I realise most people know clothes do this, and that it doesn’t really look like a boner anyway. And people generally aren’t looking at me wondering if I’ve got a boner, and they probably don’t care if I do unless I’m also staring at them or something. … So now I just worry about accidentally staring at people. (And my eyesight isn’t great, so it isn’t always easy to tell.)