Rule 34 Dev - 20th_century_fox alluring alvin_and_the_chipmunks alvin_and_the_chipmunks_the_squeakquel alvin_seville anthro anthro_on_anthro anus avoid_posting balls black_and_white brittany_and_the_chipettes brittany_miller chipmunk closed_eyes duo female lying male male_penetrating mammal missionary_position monochrome on_back penetration regency_enterprises rodent semi-anthro sex sketch straight vaginal_penetration whippytail young|3168923112