I find that with a condom on, I miss a good deal of the extremely pleasureable sensations when she's just been inseminated by her BF. Yet, I can cum, although I have to work a bit at it due to the loss of that sexy sensation. What I discovered the first time this happened (when I took sexy seconds with my wife after her BF ejaculated in her and she pushed him off so I could climb between her legs and finish) was that I had to work hard to orgasm, and when I looked down at my soft penis with the condom drooping down full of my semen, the condom was slick and glistening both inside and out. Ouside slick with his sperm, and inside with my semen in the reservoir. He was sliding his fingers back into my wife's vagina as we all chuckled at that pathetic condom hanging there from my glans.