"I've got it down to a science," Federline, 27, tells TV's Access Hollywood. "I can do it with one hand tied behind my back with the phone on my ear."
Born last Sept. 14, Sean Preston has a proud papa who says he doesn't mind the possible mess of the diaper changing. "If it's your child, it's different," he explains. "You don't care about those things. It's so minor. You become a parent and nothing else really matters."
When it comes to addressing his baby, Federline – who admits that he prefers not to be called K-Fed – says that he calls him "Sean P ... that's my boy."
Federline also says that he, and not Spears, will be in charge when it comes to disciplining their son.
And will they have another child? "We'll have to see about that one," Federline replies.
As for his professional life, Federline tells Access that he is still writing and recording his first CD, due for release in April. Despite earlier reports that its title will be "Truth," Federline says: "I was thinking of calling it 'Rearranged.' It's time I come out and take control of my situation so I'm rearranging my whole character and letting people know who I am.
"It's not like everybody knows who I am. You see this picture of me and it says this and that and that's not true."