Therefore

Why is 6 afraid of 7?
It’s not. Numbers aren’t sentient and are therefore incapable of feeling fear.
I think therefore I yam.
A horse walks into a bar. The bartender asks the horse if it's an alcoholic considering all the bars he frequents, to which the horse replies "I think not!"
POOF! The horse disappears.

This is the point in time when all the philosophy students in the audience begin to giggle, as they are familiar with the philosophical proposition of Cogito ergo sum, or I think, therefore, I am.

But to explain the concept beforehand would be putting Descartes before the horse.
What is a potato’s life philosophy? I think, therefore I yam.
The Personal Ad
The Personal Ad A lonely widow, aged 70, decided that it was time to get married again. She put an ad in the local paper that read: HUSBAND WANTED: MUST BE IN MY AGE GROUP (70s), MUST NOT BEAT ME, NOR RUN AROUND ON ME, MUST STILL BE GOOD IN BED!! ALL APPLICANTS PLEASE APPLY IN PERSON. On the second day, she heard the doorbell. Much to her surprise (and dismay), she opened the door to see a grey-haired gentleman sitting in a wheelchair. He had no arms or legs. The old woman said, “You're not really asking me to consider you, are you? Just look at you...you have no legs!” The old man smiled, “Therefore, I cannot run around on you!” She snorted, “You don't have any arms either!” Again, the old man smiled, “Therefore, I can never beat you!” She raised an eyebrow and asked intently, “Are you still good in bed???” The old man leaned back, beamed a big smile and said, “Rang the doorbell, didn't I?"
A woman arrived at a party.
While scanning the guests, she spotted an attractive man standing alone.
She approached him, smiled and said, "Hello. My name is Carmen."
"That’s a beautiful name," he replied. "Is it a family name?"
"No," she replied. "As a matter of fact I gave it to myself. It represents the things that I enjoy the most – cars and men. Therefore I chose 'Carmen'"
"What’s your name?” she asked.
He answered "B. J. Titsengolf."
I think, therefore I’m single.