Why TMI?

Claire
I've been a member of this community for a while and I find it very resourceful.
BUT, one thing I have noticed that I find strange is people saying 'sorry tmi' for saying this like breasts, boobs, discharge, diarrhoea etc.
Seriously, why is this TMI and why do done abbreviate boobs. We're females and shouldn't be scared or ashamed to use the word boobs!
I 100% understand using the TMI warning for not so nice pics as it might gross some people out, but to use it when advising you have creamy CM is just weird - well in my opinion anyway
Well, vent over.  Baby dust to all 😊
PS - I had diarrhoea today 🙈