No it does not effect erection or erousel, i just had one a month ago and if anything it kinda of raised all the above, but word of advise - give yourself time to heal. As the outside looks fine and healed the inside is still mending so take it easy or you can pull sutures like i did. Sex is good after 2 weeks and soreness goes away, but doing heavy pulling or lifting should wait awhile. If or when you get one- ice,ice,ice them down. I used a bottle of water and froze it as it was the most comfortable rather than a bag of frozen veggis.