Nothing gave that indication
Nope. The dude who said that liked that girl. You can say that he was like a kid bullying his crush, and he was upset that the girl likes our golden boy that's why he said those nasty lines.
Last I remember it wasn’t true, it was a mistranslation. People corrected it saying the wording was wrong proving that it wasn’t the case in both Korean and Spanish language.
Anyways this chapter implied that he may really be a virgin by how serious he was lmaoo.
Now that's confusing. I remember someone pointing out that chapter where it was mentioned that he's sleeping with that young girl who keeps calling him. And now what? Is he really a virgin?