http://www.xvideos.com/video112923/jerk_off_on_my_butt_crack_part3_3   would this be safe to do ?   Do any providers provide that service?

Technically its not sex lol.

Had a lady do this to me recently, so well, that I first thought I was in uncovered. She lubed up and did it slowly...it was heaven.

or just cover up and go for it,  I am not too sure about whether it is safe or not

Is less safe than DATY or having your date sit on your face after you fuck her ass (your last review)?