A fly in one of the two girls cup.
...any suggestion of violence, degradation etc should be as off-limits as children or animals, period. This has spoiled a few GGG scenes for me; bukkake, if it's your thing, should be about worshipping the girl, not humiliating her or forcing her to do something nasty.
edit: And, btw, i think it's a bad, bad idea for any man to "worship" women in any way, shape, or form. A really good way to get walked on and taken advantage of. Women should be treated as people, which they are, not goddesses, which they are not.
what turns me off is big aereoles like www.mikabrown.net