How long do most men last in bed?

So, umm... this is kind of an embarrassing question, but I was wondering how long most guys last in bed? I have only been intimate with one man, my fiance of three years, and lately he's been going for five or six hours at a time. Not that I'm complaining; it is really really fantastically good! It's... show more So, umm... this is kind of an embarrassing question, but I was wondering how long most guys last in bed? I have only been intimate with one man, my fiance of three years, and lately he's been going for five or six hours at a time. Not that I'm complaining; it is really really fantastically good! It's just that after a while it starts to hurt and the pain makes it hard for me to want sex later. I know he's doing this for my pleasure, I just don't know how to tell him to hold back a bit because I'm scared of hurting his feelings. Is this normal, and any suggestions?
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