I usually think about war and tanks shooting at villages to make me slow down and last longer. sometimes I open my eyes and look at the girls face to see what she does or how she feels.. it feels great to see her smiling like she never felt that way before.. :)
you have to do less thinking and more feeling. if you are thinking while having sex then it must be really bad sex.. you should change your position so you can watch some TV while doing it.