There were two of them in a yard next door to where I was doing some work several years ago. They were having turtle sex. He would pull back... slowly... then (slowly) do the next down stroke with his head thrown back letting out a "" haaaaaaaaaaaaaaaaaa"" bleat. I haven't laughed that much about any sex act I've ever witnessed... to include losing my virginity. I think I have a video, somewhere. I'll look for it tonight when I get home.