Theo James Says Woman Pooped In His Bathtub After First Date

Theo James has clearly ended up on some s****y first dates ... 'cause the guy says he once went out with a girl who ended up taking a dump in his bathtub! The actor recently sat down with Entertainment Weekly for a panel discussion and played Two Truths and a Lie -- a game where a person says two true statements and one lie and others guess which is which -- and he said a woman once left him a brown reminder of…