Substitute submission. (Patreon)

Some of our submissions require to have a certain genital options. Like most of penetration submissions expect you to have (guess what?) penis! And while we don't have a Strap-On accessory I'll decide to just change it to the oil check on the fly. So, if you ask your character to penetrate someone, but you don't have a dick to penetrate - you'll have an oil check instead. Reasons? It's always good to have an extra oil check!