text: how long should i last in bed? me and my high school girlfriend just got intimate for the first time yesterday. its my first time too...well it was great of course..but i dont know how long i should last. i dont want it to be too long or too short. girls how long should i keep going or what a good time it all depends sometimes the girl wants it to end fast like if i am really not in the mood or not feeling well , tired.  your first time should be fast its hard not to for men. also its ok to end fast as long as you can go for a second in maybe 15 min's later that's what i do.   start with quick foreplay let the guy get off.  then when hes ready for part two take it slower because you will last much longer.  the more often you do it and the more times you do it you will learn to last longer and longer.  do not fight nature. monkeys and apes last about 9 seconds so if a girl says anything bad about you throw that at her.  to bad i cannot use that line.