That doesn't necessarily mean he's gay.That would be like saying all the lesbians who like it up the ass really want a man.however, a full foot of ANYTHING fitting in his ass is pretty astounding. ..
Definitely a normal desire to take objects deeper. I've been able to take 15 but it becomes harder with thicker dildo's because they won't bend around your sigmoid sphincter so I recommend going with a thinner dildo and slowly work up to greater depths.
There is a sigmoid sphincter to get around at about the 8 inch mark that could cause problems. Better to us a 7 inch dildo with more girth. I’ve been fucked by a half dozen women and fully satisfied with a smaller dildo.
I think it's normal. I am a man and fantasize about my wife doing that to me. Maybe not 12inches but all the same. I think a lot of men want it atleast once but will never admit it.