Something odd about a man that has as many tattoos as Louis does

Something not normal I've noticed about Louis and haven't seen anyone else mention this. Louis has a tattoo for his mom, has a matching tattoo with Zayn, a matching tattoo with Zayn, Harry and Liam, all of the complimentary tattoos with Harry, he let Richard give him a tattoo, got an "E" that he says is for Eleanor (yea right) got a tattoo with his band but.... He doesn't have a tattoo for his son. Who has as many tattoos as he does but doesn't do that. Zayn has, Liam had talked about wanting to do a chest piece for Bear, Harry has for his god children. Kids are also usually curious about tattoos so it makes me wonder if Freddie has asked about them and if so what does that say about him still not having one. This is not me trying to be mean this is me saying I want people to really think about something that just does not make sense for a father.

PS I have to bring it up if that E was for Eleanor why not get it where she got hers, yes I know he has the 2 there but he could have put it on the other side but instead he puts it in the same spot Harry has the cross that I know some think it's actually a L & T.