Seeing bigger dicks sharing wife

I have what I consider a petite penis, which I am very vain about, but when sharing my Mrs with friends I've seen some really big dicks. It's sort of a shock when your wife can't wrap her fingers all the around a guys shaft, or the knob is too wide to fit in her mouth, or it's about twice as long as yours. I have only DP'd her pussy with average sized guys, so haven't actually touched large dicks very much. We checked each others dicks out with a quick squeeze of each others shafts to compare the effects of d**gs that gave us super firm marathon erections, and the larger guys seemed softer than the average to small sized friends dicks. The few times we had real gang bangs, we all watched, but we watched closer when the really hung guys were pumping, like it was more of a show than it already was. My Mrs has a smallish pussy so taking the larger dicks was a sexual challenge that wasn't always comfortable, but she was always glad she did it. Our well hung friends felt a bit guilty for hurting her a little, and guilty for wanting to do it more. Exactly why I got an extra thrill seeing her stretched by an over sized dick is a mystery I would like to discuss with some other husbands. I'm not turned on just seeing larger dicks, but I am when combined with my Wife's pussy. I feel proud of my Mrs for taking them, and I feel more the perv for getting her to let them enjoy her. Just remembering what it looked like with a couple of the largest guys makes me horny for her. If you average or petite sized husbands have some thoughts I'd like to discuss them.