The body has a way of expulsing fluids, for example, urine, menstral waiste and this also includes sperm. I'm assuming that you are attempting to get pregnant, if that is the case then raise your legs and ups completely up for a while, but it will be natural for the remaining fluid to be expelled from your body and to shower immediately afterwards to avoid unpleasant body odor. I also recommend that if you attempting to conceive, that you contact your gynecologist for the best time and method to use. Good Luck, Judy
Something else to consider along with Judy's post is your partners sperm liquidity. If his sperm is rather liquidy in that its not very sticky but more running that can be something that a urgolost may want to look into as well. Maybe something that need to be tested if you are trying to get pregnant too.
Good advice from both male and female points of view :)