I have not got a foreskin and when I first started masterbating my glans was very sensitive and I would cum very quickly with only a few strokes.
Now after a few years of masturbating once or twice a day my glans is less sensitive and I can last sometime before having to ejeculate.
I have always wondered what guys with foreskins feel when masturbating and do they loose sensitivity or because of the foreskin is it just as sensitive as when they first started ejeculating.
Also can they cum inside the foreskin or is it automatically stretched back at the stage of cumming.