Was it romantic one-upsmanship that put “Twilight: New Moon” star Taylor Lautner on the cover of Men’s Health this month? It puts him head to head with girlfriend Taylor Swift, who appeared on the cover of Women’s Health last December. It’s hard to outsell anything Swift does, but Lautner packed on 30 pounds of muscle to play Hollywood’s sexiest werewolf, a workout he details in the magazine.