the diff. between girls and guys

I have been thinking. and i have come up with this conclusion. girls have a different sense of humour. i dunno about sexual jokes, cos i think its a bit rude to tell these jokes(especially the worse ones) in front or to girls. but i know about lame jokes.
for example, i tell purple passion to a guy. he's annoyed. but then laughs. or sort of laughs. i tell the same joke to a girl. then she's annoyed and then goes kind of hyper, then expresses how annoyed she is, then rants on about wasting her time over and over again, then kind of "hates" me for life. you can clearly se a difference. i think guys appreciate lame jokes like this more than girls. i am not being sexist.
I have come up with a theory. girls and guys brains are different. guys are more "logical" while girls sort of excel in communication. most lame jokes deal with lateral thinking. yes, lateral thinking. they are kind of smart. they do make sense. very common sense. but still is funny, cos you often don't think of the answer even if it is really obvious. however, the common sense is actually very uncommon nowadays. and obvious answers are always overlooked. and the mind thinks up complicated stuff. so, these lateral thinking puzzles are more "logical" so to speak, and thus, the guy's mind will be able to appreciate it more. they can see the humour in the joke. how they were misled into thinking about something else. on the other hand, girls will not really appreciate this and think its utter crap. and taking time off for crap is a waste of time. therefore the violent reactions.
i base my theory on fair scientific evidence. maybe not evidence. but proof. but they're both the same thing. so i'll put them in inverted commas. this is based on experience(field studies) and scientific "proof". feel free to give your comments.
please note that i do not have any malicious intent in writing this post, and that i'm not being sexist. i'm merely stating my observations and trying to come up with an explanation for these occurrences. in an objective(as far as possible) manner. i am not slandering all you gals out there. please do not hate me for this or anything. this should be subject to open dialogue. as i said earlier, feel free to give comments. no flaming. and no vulgarities. thank you