Should I be concerned

that my son took a little red sticker that said, "press here" and stuck it to his butt and then pulled down his underwear and said, "Hey Moon, press here!" and then said, "No wait," and took the sticker off his butt, then stuck it to his penis, then said, "No wait," and took it off his penis and stuck it to his testicles, and then shook with laughter while yelling, "Press here! Press my balls. Look, Moon! Press my balls! Mom, Press here! Press my balls!"?

Nah, that's totally normal, right?