Affectionate preliminary is a whole set of methods of manipulation and techniques aimed at making it clear to your partner from the first days of the relationship that you value your partner and his importance to you. This is a kind of reminder of your love for your loved one when he comes.
The main difference between foreplay and others is increased tactility. In simple words, these are persistent and even annoying caresses, which are entirely based on feelings and the desire to show another your importance and love. Such caresses can include kissing, stroking without stopping and tightening hugs, etc. But above all, keep in mind that this style of pleasure may slightly discourage you from pursuing a loving relationship, because no one likes to feel overly intrusive or forced. So, gradually stimulate and encourage your partner to have sex, focusing on the sweetness of the sex process, and not on the physical act itself.