When penetrating one of the girls vaginally or anally wait until there pleasure meter is near full and they are giving a dialogue about almost coming. Then stop. If done properly the girl will give some dialogue reflecting being denied there orgasm and there pleasure metre will reduce part way. Just have to repeat this process as many times as required for the goal. Just be careful to not actually let them reach orgasm, if found it easiest if you use the auto move option set to a slow pace when they get close just turn of the auto and it should immediately stop thrusting triggering the tease.So, uh, how do you trigger teasing events?