A lot of people have tattoos they wish they could take back.

Just ask these people.

But for Mandy Moore, she doesn't regret her tattoo whatsoever.

The This Is Us actress was on Late Night with Seth Meyers when she shared the cute story behind the...'adult'...tattoo she has on her left foot.

"Well, about 10 years ago, I was on tour with my band. I had my own room to shower in ... all of the guys in my band shared a day room. Their one rule was nobody was allowed to do ... that thing in the shower," Mandy Moore said.  'That thing' she's referring to is masturbation.

So what is this tattoo she speaks of?

A sperm.

Ya, you heard me.

"It became this big joke because one of my band members was like, "˜I don't want babies on my feet.' And so we created a song called "˜Babies on My Feet' that we sang on stage every night. No one had any idea what we were talking about," she says.

After the tour, everyone in the band got a tiny sperm tattoo to commemorate that song.

But she's the first to admit, not everyone thought it was legit.

"Right after I got it, I went and got a pedicure and the woman was like, "˜Honey, I'm trying to scrub this off and it looks like permanent marker,' and I was like, "˜No, no, that's a tattoo and it's not going anywhere,'" she told Seth Meyers.

If you want to watch Mandy's entire interview, you can do so here!