I heard my folks last nigth! wowsers! wut now?

well for the first time in 19 yrs of my life i heard my parents! i seriously couldn't believe my ears! I am SO traumatized because i was bout to open the door, to tell my parents the music was a lil too loud , then i heard some really weird noises and it took me a while to realize wut was happening! i had to cover my mouth because i was seriously bout to burst out laughing! Tho the taught of it makes me sick! now i know everyone says its normal! but come on! am not a parent yet but... to those who have children and pre teens! ur kids dont wanna hear ur business! or know about! its perfectly normal i know! and it makes me happy my parents still have a great merriage...but come on keep it quite! Your kids dont wanna hear it!! espeacially if their lil ones! i was really scared for my baby sisters worried that they might have heard it! I had to make some type of noise myself to let them now i was awake! and they quite down a bit... lol the horrible thing is, its weird and i cant look at my parents in the eye without being a lil weirded out! i dont know wut to do! i try not to think about it! but its Haunting me!!! BLAH!!!!! HELP!!! anyone gone tru this before? and if u have wut ya do about it? =b thanks a bunch!!!!