ye but the thing is i dont know how to even make a fist im on keyboard and i tried all buttons but nothing seems to workIn valve index controllers that menu is opened with A button (TAB in non-VR). Yet, you can just try all of them lol.
From what i have seen it is working only if you have smaller ingame palm (changed with 'player scale' parameter in options) I mean, the bigger your hand, the harder they are taking it. From my experience, it is ok if your scale is around 70 (at least Marina takes it like a champ), but this could be different with other characters.
By the way, if you're playing non-vr version, C button on your leyboard makes all dick characters (including Marina) ejaculate and increases excitement level for female characters to maximum. Yet, not working for scenes with multiple characters (except Emmy x Riley)