We have a great article that goes into what can and can not cause pregnancy here: http://www.scarleteen.com/article/bodies/can_i_get_pregnant_or_get_or_pass_on_an_sti_from_that Some very specific conditions need to be met for there to be a risk of pregnancy, and during a lap dance or dry humping, when at least one person has clothes on, those conditions cannot be met.