Having a threesome can be the top one sexual
fantasy of many swinger couples and singles. However, the number of people who
really had a threesome is rather small. There are mainly two reasons for this.
First, swinger couples are afraid having a threesome might influence their
relationship or marriage. Adding another person into the bedroom is quite a big
deal. Second, swinger singles think having threesome with other two people
might threaten their safety or increase the chance of catching STD.