About a week ago, I had protected anal sex with a receptive partner. The only activity that occurred without the condom in place was oral. The day after, I noticed that the head of my penis felt sore. Just under the rim in a tiny section. There is no redness or irritation at all. It just tender to the touch a little. I'm wondering if the condom could be the reason? It was a little snug. I'm a 32-year old circumcised male and this irritation is new to me. Any thoughts?