I'm fwb with all of my exes some are even married and in serious relationships. These friends are generally good people and sometimes need someone just to bounce ideas off of, it was explained to me by one ex that our relationship is different because most of the guys they used to mess with don't care about the friendship part of benefits. I am an active listener I give advice, listen, hang out, sometimes play with the kids, and when the day is over If they want some benefits I provide that as well. Let me be clear I'm not in it to ruin anyone's relationship, I assist in keeping the relationships together as long as they are healthy, I also promote healthy living, and will help out around the house. Cuddling is always preferred and sometimes watching movies, or television shows, leads to more but their preferences take first priority and as assays safety and cleanliness first.