Not a massive problem, but quite annoying.
DS 3mo - won't just get on withit - suckles a bit, then pulls head back, sucks fist, milk pours down me or goes in his eye, generally makes a mess - so I have to stop milk, cover up quick if out, yank fist out of mouth and start again - and repeat..
He is generally a real fidgit, if I take him out in sling he ends up nearly wriggling out of it 