There are 3 phases during the seduction process. Effective skills may change between phases, but that's is not a guarantee. The same skill may be effective for several phases. Pretty much nobody likes going for intimate parts from the start. This leaves you with 3 skills at the start. And for the 3rd part, intimate parts are the correct target most of the time. Effective skills aren't randomized between the same girl types, if it works with one - it works with all of them.
Plus, you can buy a shiny brooch that will increase the turn limit in the bar.