Souma is really susceptible to cracking up, and even memories will put him into laughing fits. But being self-conscious about this, he always tries to hide it. When he does this again at a clothing store his friend works at, the friend asks him why he does that, especially when it's so easy to tell anyway. Later, Shun also repeats the same sentiment...
You're a guy. You should just laugh out loud, already.
أنت شابّ. اضحك بصوت عالٍ فحسب
Als Mann kannst du ruhig offener lachen.
Eres hombre, ríete con ganas.
Eres un hombre, ríete con ganas.
Sois un mec et ris ouvertement.
Sei un uomo, ridi a testa alta.
Você é homem.
Ri pra fora, cara.
Ты ж парень, так смейся нормально.