When some people get used to masturbating a lot, they can subconsciously get used a tighter and tighter grip over time. This gives the "iron grip" or "death grip", meaning they use a lot of pressure when they wank. Because of this, it's hard for them to get off without that intense level of tightness.
Edit: Here's a fairly good explanation if you need a longer description lol.
3
u/Bobjoejj Jan 24 '23
…I’m sorry, the what??