Should I have a ?

I guess you could if you're both alright with it. I think your relationship will be fine as long as you both agree. It might make you both more "loose" if you know what I mean. But maybe that's a bad thing. Maybe you would feel more inclined to try such things more often. It's been found that one person can only care for a maximum of 150 people-as in family members, etc. So it's highly possible that you or he may feel inclined to try this with someone else. Whether that's a good thing or a bad thing is up to you.