Well, there are countless ways to love. I think love matures with the person, I certainly love my husband differently than I loved my first boyfriend in high school. It's not even necessarily the person, its the circumstance, when your young (high school young) there are no responsibilities for 90% of teens, love is new and unrequited. When you hit college, you're discovering yourself, and find out that there is more to love that the boy in high school. When you're out of college, you're in the working world, and now you have responsibilities of an adult, rent, bills, etc, that all make life a little more complicated. So of course love will change along with all of that. I do believe that's the rule though, but not the exceptions. When a couple has children, love changes, because now you have someone to love in a way you've never experienced before, and its new and exciting, but you also have to continue to nurture the love with your partner, as well as the refreshed love you have for him/her when you look at the human you created.
I can't really think of anything strange that I've done while in love, usually the strange stuff happens when coping with loss of love. I've never been one to lose myself, when in a relationship, but I know many who do. I've also dated several men at a time (dated and kissed, but nothing further than that!) when I was essentially in college, they all knew about each other though, and still thought I was worth it I guess. I won a couple hearts with my Karaoke skills (must have 2 shots of jager, at 3 shots I can no longer read the prompter!). I quickly learned how to score free drinks, ("Oh wow, what is that? (looking at his drink) "Oh, it's a this, you've never had one? Bartender!").
Well, that might not be the info you're looking for, LOL, but I can't really think of strange things I did while IN love. Now while trying to FIND love, that's a different story