“The younger generations of circumcised boys have been cut much looser than previous generations, retaining some of this gliding motion. I have seen penises of older lovers who have almost zero moveable skin. When this happens, the penis rubs during coitus, rather than slides, and it is rarely enjoyable. Well endowed men with tight circumcisions have been known to cause vag-throb.”
https://insuremekevin.com/sex-and-circumcision-from-a-womans-perspective/
Autocircumcision 