yep, went through that with both of mine....DS still has his moments.
I tried distraction, singing, faces, toys, his sister....in the end it's so bad that sometimes I have to put one of his ankles in between my legs to hold him still (if he's on the bed) and on occasion I have had to hold his shoulders down with my feet so i could get a mega pooey nappy off....

Truely - it passes.