How to persuade your husband into having a threesome?

If you want to have a threesome with your husband and he is very reluctant to it, there are ways to acheive that.
First of all, you need to get used to talk about sex with your husband. If he is very conservative, you need to change it.
Second, find out the reason why he does not accept threesome.
Third, watch some threesome movies with him. And fansy threesome with him. Let him know the benefits of threesome.