"My neighbours are once again having noisy sex. You're my only hope: could you ban risqué exercises after 10pm?" the man asked Wikstrom on Twitter.
The reply he received was likely not what he expected.
"Sounds nice for them, I think," Wikstrom tweeted back. "Good for their well being and thus, public health as well," The Local reported.
Most apartment blocks in Sweden don't allow tenants to conduct loud activities after 10 p.m., like vacuum cleaning or drilliing, but loud sex? It's okay, Wikstrom said.
"I wanted to reply in a funny way," Wikstrom told the BBC after his tweet went viral. "Sex is a political matter as well. We often discuss sex in negative terms, like, for example, we relate it to rape, we relate it to sexual abuse ... but not to the positive thing that sex really is. I think we should really start to talk about sex as something positive.
"I think Swedes should have all the sex they want to have," Wikstrom went on. "Many Swedes feel they don't have as much sex as they want to because of stress and work-related problems"
He called that worrying.