1) I was raised into believing that sex implies serious relationship and vice versa. As in "if we are having sex that means we are in serious relatioinship".
As it turned out - this does not work like this for most (many?) people. Turns out yuo can just have a good time and some sex without worrying about 1001 things before you do so.
2) I simply do not like dating. Like at all. For me a perfect date is the one that I can attend during my lunch time or maybe after studies\work. Definatelly not on weekend. Definetely not longer that 2 hours (well 3-4 if we are really into each other and both have the same kind of thinking about how to spent free time). May be just bad luck but many girls I've met wanted those stupid 6 hours walks around the city talking about all things you can imagine. (don't you have things to do?)
3) I failed to realise I can suggest any type of activity during our date and not just try and adjust to her preferences. As a result a bunch of dates were just me doing shit I didn't like
UPD: fixed a few obvious typos.