I have a full side/rib tattoo took 9 hours all up of 3 hours sessions due to $$ haha. It wasn't that bad, my calves were worse in my opinion anyway. Over my kidney wasn't pleasant and the bit that's in my arm pit didn't tickle but it's not unmanageable just breath and try to relax, my artist was a friend so was constantly cracking stupid jokes so that helped a bit.
The breastfeeding thing is because while unlikely you can catch communicable diseases from tattoos.
Edit to add what I have.
Both feet, one a swallow/sky scene, the other writing and cherries, roses on both calves, sugar skull rib piece, half back piece on my lower back-swallows, nautical stars, upper back I have big wings and my daughters name that I added later on, should probably add my sons name, a half sleeve, both wrists, behind each ear I have my kids first initial. I want to get my chest done and my other sleeve, but $$ is always holding me back 😩.