Unprotected sex is dangerous especially when you are casual about it I mean when you are doing it out of wedlock, because it risks your life to lethal infections like AIDS
which are incurable till date.
Because you are on contraception
(I think on OCPs) so you are not pregnant because they have a very low failure rate about 0.1 to 0.3% only. But mind you enjoyment should not come that heavily on life!