Focus Features has put the bite on “Cougars,” snapping up Erik Lindsay’s romantic comedy spec and signing Joe Nussbaum to direct at its Rogue Pictures division.Story revolves around a group of young men who — fed up with dating women their own age — discover the pleasures of dating older women. Lindsay and Nussbaum teamed on “American Pie 5: The Naked Mile” as writer and director, respectively. Earlier this year, Warner purchased Nussbaum’s spec comedy “Brad Cutter Ruined My Life…Again” for Donald De Line to produce. Nussbaum co-wrote “How to Eat Fried Worms,” a co-production of Imagine Entertainment, New Line and Walden Media. Nussbaum is repped by Endeavor and Lindsay’s repped by UTA and BenderSpink.