You've heard people use arguments like that to justify themselves.
"It's no big deal. It's just a little sin. It's up to each person to decide whether it's sinning or not."
Here's the problem with those mind-sets:
Christ dying naked on the cross for our sins was a big deal.
Jesus wasn't flogged and crucified just a little bit.
God didn't raise Jesus from the dead to give each person His blessing to pick and choose what's sinful and what is not.