I guess the best effect is if they dont see you dressing - but waiting for your partner dressed in lingerie might be a romantic idea, but not very practical. After a long day at work, he might want to start with food and shower...
And once things get interesting telling them, hey wait a sex, Ill put on something sexy, and disappear to have something on for 2 minutes is kind f... pointless.

So how do you time the getting dressed part?