Getting a Little Clingy

Nate has started to get a little clingy to Mommy. I don't know if it's just a stage that is normal for his age, or if he senses that he will soon be getting a little less attention from Mommy. His new favorite thing to say is, "Mama...hug". He says it in a very pleading way. How could I say no? One day, I was trying to go to the bathroom and he had to come in 3 times for hugs. Daddy kept removing him from the bathroom and Nate kept sneaking back in for "Mama...hug".