Absolutely not. Penis size in photos and moving images is irrelevant to this woman who is as aroused by visual imagery as any man. It is mostly men who are obsessed with penis size and the imagined superiority or inadequacy of its ablity to satisfy a woman.
http://www.adbusters.org/spoofads/fashion/obsession-m/
Are straight men aroused by images of large vulvas? How about large clits? Does anyone stick measuring tapes inside a vagina to compare its size with other vaginas? Something to think about.