Baby boy's Haircut rant!!

Nn

My baby is going to be 4 months old on February 22 today my husband and I decided to go ahead and cut our sons hair cause he was born with so much hair I'm surprised I waited this long .we just cut his hair short hes not bald and well my parents are Mexican and are really superstitious I heard it all when my son was born "dont clip his nails with nail cutters till he is older cause if you clip his nails you will make him go blind " and dont hold him that way cause your gonna make him cross eyed" the list goes on ....well they were upset that I cut his hair and again warning me that hopefully he doesn't get sick or have bad eye sight cause we chose to cut his hair at this age instead of waiting till he is a year old but anyway what are your thoughts?? Any one else's family have any superstitions that were said to you please share