Wife: I’m pregnant.
Husband: Hi pregnant, I’m dad.
Wife: No, you’re not.
Wife: I’m pregnant.
Husband: Hi pregnant, I’m dad.
Wife: No, you’re not.
Hey, check it out, this dummy thought he was being all funny by using the 'I'm dad' joke when his wife told him she was pregnant. But plot twist! Turns out he isn't even the real dad! You know, because he is the author of the post, and that makes him very stupid! I bet you still don't understand.