falling in love is hard on the knees

years ago, when aerosmith released this single, i asked my cousin why is falling in love hard on the knees? he said its an R18 thing and im too young. it was 1996 or 1997, maybe even 1998. point is, i was a highschool student. what the hell was he talking about that it was an R18 shit? i knew more than him when it comes to stuff like these and now, i still know more than he does, a lot more. the pervy sage isnt too young for shit like these.

anyway, the reason i asked was because i had a follow up question (i had the nasty habit of asking in twos, the first question is only an introduction to the second question). i knew the answer to the first question of course. but my real question was, does the title really make sense? the person is still in the stage of falling in love. how come its hard on the knees already? its possible to do it the other way around, to make it hard on the knees and then fall in love while doing it. but to make it hard on the knees while in the process of falling in love? i dont think it works that way. i mean, the person is just falling in love, how come they're doing it already. its possible to fall in love while doing it but the act of doing it comes first before the falling part.

thats how i saw it back in highschool. now, it kinda makes sense, especially when you look at the lyrics and not just the title. and its really hard on the knees.