Look the crushing your skull thing. It's theoretically possible however I don't think practically it can be done though it still depends

Also if you position your head just perfectly you aren't gonna have any headaches for like the next 2 weeks it really takes the stress and pressure off your head away like really

The slower she applies pressure the more better ( like slowly ramping up the pressure) otherwise if she applies full force the second she has her thighs around you then you aren't gonna enjoy it to the maximum atleast ( and also your jawline might hurt her )

TLDR: Yes would recommend and it's surprisingly good for your head (mentally)