It is often used when explaining something sexual or sometimes of awesome or epic proportions to someone who is not familiar with it. Or such as giving a person your "seckscake" means to have secks or to want to have secks with that person. unlike "sex", secks consists of no sexual intercourse. Seckscake(s)'s is usually followed by a "please" at the end of it too.
Guy 1: dude that girl is so hotttttt
Guy 2: mmmm god yes, SECKSCAKES PLEASE.