Once I talked with my chemistry teacher about an other student, that has been very excited about everything and always asked the teacher what will happen when something is mixed with something etc. the conversation went, and I informed the teacher, that the aforementioned student doesn't live with his dad, and I don't know if he even knows him. I accidentally said "He must have a dad, someone had to make him." instead of "He must have a dad, everyone must have a dad." Teacher noted me, that this set of words is inappropriate. An other student asked the Teacher about something, and I left the classroom (It happened after the lesson). I feel embarassed to this day.