This vid shows that you can have pleasure as "top" without penetrating the "bottom". I did so sometimes when I had the feeling, that fucking would not the right thing in this moment. This is caring about the partner, also when he is paid for the sex.
I'd have loved to have an older guy teach me and let me explore my bisexual side when I was younger. I'd have gladly shared my younger flesh and fluid with an older male if he could keep our sexplay a secret.