Imam al Sadiq (as) said : If one of you goes to his wife, and directly have intercourse with her, so If she hits a black man, she will cling to him.
So if one of you goes to his wife, let there be foreplay between them [before coitus], for it is better for this matter.
Rasool Allah (saww) said : All play and games are futile except for three – Horse riding, archery and foreplay with your wife, and these three are correct.
Divine Treasure 