Given theories like evolution and the like, I’d like to say the thing that makes me who I am is rather who had sex with who, than who was thinking or not… therefore:
Coitus ergo sum
(From latin, “I have sex, therefore I am”, a bastardization – I love those! – of “Cognito ergo sum”, also latin, “I think, therefore I am”)
Not to mention that this is, in my humble opinion, a more honest reflection of the human condition. I mean, who stands around thinking when they could be having sex? 😛
If the genie is out of the bottle, then surely it was possible to put it in the bottle at least once. So why is it impossible to put it in there twice?