Poly couples?

My husband and I are adventurous and exploring our more deviant sexual side with other partners. Oddly enough I have found that I immensely enjoy the feeling of not only the sex with my husband and my guy friend, but the calming after glow of us all laying in bed together. I've done a lot of reading on polyamorous relationships and feel like I fit the bill. Is anyone else in this type of situation?  I guess I'm really curious more than anything if these feelings are the start of a poly bond. 
​Before anyone jumps to conclusions, I am 100% happy and committed to my husband. There isn't something wrong with our marriage and he isn't lacking in any sort of way. I just feel like having the 2 men there with me feels...normal? Monogamy has never felt right.