there isn't conflicting data, there's people without foreskins not knowing what they've lost and people with foreskins who don't know how to jerk it properly.

as someone with a foreskin i can tell you with the utmost certainty that it is an erogenous zone and makes the experience infinitely better, it is unfathomable to me how circumcized people are even capable of masturbation and intercourse, it's like trying to swim without feet.