I can easily paste from the primary selection using middle mouse button (Button2), or with the keyboard (Ctrl-Shift-y). To paste from the clipboard I can use the keyboard (Ctrl-Shift-v), but there is no way to do it with the mouse.
Wouldn't it be great to be able to paste from the clipboard selection, using the mouse? I think so. Would the maintainer of st like to make this part of st? Here is the line that I added to mkeys[] in config.h { Button3, XK_NO_MOD, clippaste, {.i = 0}}, -- Contact me: I am available on SIP, Matrix/Riot, and Jami. Just ask for my address.