A lot of times if a guy grabs your attention and you want to make sure that he has full on sex with another human being (if that is what you are looking for) you can go on OF/Just4Fans and scroll thru and see how he describes the various scenes. You may not be able to tell. If you just have to gave a gander, then (if he is not offering a promotion) just pay for a month AND make sure you disable the renewal function. If you want to renew you will always have the chance. Then plan to put aside a certain amount of time so that you can just go through all the stuff he has to offer and break out the lube. If appeals to you there most certainly will be a few or more vids that you will watch. Especially if he hooks up with guys who you also like.