Hah! I often wish I had a dick too, so I could a) not send it to people, and b) have sword fights. I see guys all over my dash playing meat-sword jousty-time, so it must be common, eh?
Source: A Heart Like Crazy Paving
Just because she doesn't like getting unsolicited penis photos doesn't mean GV doesn't like men. Or penises. (The idea that not liking unsolicited penises equals not liking penises at all is, of course, embedded in bogus Rule of Desire #1. Also rape culture. But I repeat myself. And digress...)
Instead GV likes penises, and men, quite a lot. In fact she thinks we can be pretty hot. In ones, and, as in the case of men playfully sword-fighting each other with their penises, in multiples. (See for instance her animated outtakes from Supernatural.)
I'm pretty sure most hetero Anglo/Austro/American men don't spend much time thinking about sword-fighting each other with our penises. (Hmm... there's no doubt about rape culture but I think old 70s-style feminists were mistaken about the part about men routinely regarding our penises as actual weapons. But I'm digressing again...)
As I said before I so rudely interrupted myself (as men evidently do tend to do... Dang it I'm doing it again!)
As I said, again, it's a good bet most hetero men don't think of male/male genital contact as erotic. And it's a sure bet almost no hetero men think such contact would be erotic to women.
There are probably numerous reasons for this -- both Rule 1 (it's simultaneously inconceivable and intolerable for women to have sexual desire) and Rule 2 (it's simultaneously inconceivable and intolerable for men to be sexually desired) play a big role obviously. The accompanying cultural belief (perpetrated not least by Cosmopolitan Magazine) that heterosexuality is all about men's gratification probably contributes to the notion as well.
The biggest reason, I think, is the deep cultural belief that men and women are not just poles apart but whole planets! And so it never occurs to... well... either sex that it stands to reason that if men think female/female contact is erotic, which many men do, then women would be just as likely to be similarly aroused by male/male contact.
And for the same reasons! Especially for hetero men and women! In fact, the more hetero (I'm guessing) the more likely seeing the opposite sexes together is going to seem erotic because sort of by-definition if we're hetero we're not only attracted to the opposite sex we're not particularly attracted to the same sex. Which means that two members of one's opposite rather than one of the opposite and one of your own means not only twice as many of your preferred sex to look at, it also means one less of your non-preferred sex.
Which in turn means less distraction and/or dismay (if you're phobic.) It means less self-conscious comparison. It means no matter how they arrange themselves the view of individuals you want to see aren't obscured by individuals you're indifferent to and/or uncomfortable with (again if you're phobic.) It means no particular source for envy. It means no particular source for competition. It means you can identify with the actions of either partner. And so on.
These are fairly obvious observations. Or would be if we weren't all gendered out the wazoo. When we're gendered, especially when that gendering assigns all sexual focus on one of those genders, then it's not obvious at all.
One area where we are different is plain old anatomy. For this reason in fantasy it's easy to imagine members of the opposite sex doing things actual members of the opposite sex probably wouldn't. Like sword-fighting each other with your erections. Because, gender constructions of brutal, domineering men not withstanding, penises are actually pretty sensitive. And easily sprained or even fractured(!!!)