We went on a family vacation to Hawaii which sounds fun but left us surrounded by people or parents every at second. Eventually me and my twin said fuck it and I pounded his ass right there on the beach outside our hotel.
As much as I love crazy sex, the sight/sound of another cute girl a few feet away getting the same treatment (or worse!) always makes it 100x hotter. This is why I like swingers clubs... (x-post /r/gangbang)
Sometimes, I masturbate with my foot when I want to have my hands [f]ree for sexting or just for the different feeling it gives. (link with sound in comment)
"You don't have to be a history major or a political scientist to see the bigger-dick foreign-policy theory. It sounds like this: 'What? They have bigger dicks? Bomb them!'"