I can't help but think that when someone has only had ONE sex partner in their whole life, that they don't occasionally wonder what sex with someone else would be like. I imagine I've had sex with a 100 or so women in my life, and there's often a lot of contrasts as well as simularities with each female I've been with. I specifically remember experiencing #1 and #2 as if they were yesterday. My first sex was with my 1st cousin, she was 15 (my *******'s sister's *******), and I was 16. We use to hang out together all the time, and finally got to the age of being curious. Once we had sex that first time (oral sex it was), every time our families got together, she and I would head to the basement (at our house) and strip down and play with each other's genitals. I remember when I fucked her she didn't *******, but she'd never been with a boy before ... I was her first as well. But, it was almost 2 years before I experienced my 2nd female, and I was longing to draw a comparison since I'd seen some porn.
Hopefully, when the 2 of you have your 2nd sex partners (and I'd like to suggest you try some couple swapping so you can also compare) it will be a good experience for the 2 of you. Whether you go into full fledged swinging, or cuckolding, etc ... I think all individuals should experience sex with a few extra people or that suppressed desire is going to pop up ever so often and bug the hell out of you.