The IBM/Lenovo Thinkpad has featured a "nipple" for ages. It responds better to manual stimulation than sucking though.
https://en.wikipedia.org/wiki/Pointing_stick
> It responds better to manual stimulation than sucking though.
Apparently the intended use is not as intuitive as the engineers had hoped.
alt Hacker News
> It responds better to manual stimulation than sucking though.
Apparently the intended use is not as intuitive as the engineers had hoped.