The Backstreet Boys singer's spouse Lauren Kitt Carter is currently 38 weeks pregnant with their first child, a boy, and her huge bump means she isn't able to attend to all her personal grooming, but her husband is happy to help.
Lauren admitted: "It might be TMI, but he helps me shave my legs.
"It's not sexy, but how sweet is that? I can't reach, but he will shave my legs for me."
The 36-year-old singer thinks his wife is going to be a "perfect" mother and he is looking forward to learning from her when it comes to raising their son.
He told People magazine: "I can't wait. That's the number one reason why I wanted to be with her for the rest of my life, because I know she is going to be the perfect mother.
"She is going to be the perfect person to help me, because I don't know everything but I know her intelligence, her just heart, her love and her compassion. These are things that my child is going to need."
As for the 'I'll Never Break Your Heart' singer, he is preparing for the birth of the baby by recording a special album just for his son.
Lauren, 32, revealed: "He's going to record an album, a private album of all our favourite nursery songs.
"So when he does have to travel and we're not able to go with him, we can play it."