Two guys facebooking in a lab: "Check this out"…"whoa, who's
that?"…"my brother's wife"…"not bad"…"yep, she's a fox."…"does
she have a sister?"…"she does, I went out
with her a few times."…"you should go for it!"…"nah, I thought my
sister-in-law was hotter, and I didn't want my brother to beat me."