Math joke #21

A talk in a pub between a mathematician (M) and a foreigner (F).

<F> Hey, are you a logician? What is that?
<M> Okay, I’ll explain you! Do you have an aquarium?
<F> Yes …
<M> When there are surely some fish in it!
<F> Yes …
<M> If you like fish, you also like animals!
<F> Yeah
<M> If you like animals, you also like children, don’t you!
<F> Yeah …
<M> If you like children, you probably have some!
<F> Yeah …
<M> If you have children, you also have a wife!
<F> Surely …
<M> And if you have a wife, you’re not gay!
<F> True that, cool!

The foreigner leaves and meets a friend. “Hey, I gotta tell you … I’ve met a logician!” –
“A what?” –
“A logician. I’ll explain it to you … do you have an aquarium?” –
“No …” –
“ARE YOU GAY OR WHAT???”