The same man dumped them both. When they commiserate, they discover more in common than an ex-boyfriend.
"The only thing adventurous we ever did was that three-way and he got pissed because Tamara and I spent more time making out with each other than with him. I think he wanted us to fulfill a guy fantasy about two women doing some kind of porn flick thing with him. But he wasn't man enough for one of us, never mind both."