Ok, imagine this scenario.
You are in lockdown, but your flatmate is still seeing his sexual partner. Sneaking off at weird times, disappearing for very long times. Do you ignore it or confront it?

Are they like noisy or leave a mess behind? If not, I would ignore it.

Ignore it.

Suggest that it's an opportunity for them to become closer by living together, preferably elsewhere.

I have confronted it.
My style, being a badass. Why should he get to do stuff when no one else can?
Why should my household be compromised because he can not have self control?
I call it selfish and disrespectful.

Doing an essential, such as grocery shopping,
would put the household at greater risk.
Simply based on the number of people/objects,
one comes into contact with.

I don't know that I would confront
anyone over boinking during a lockdown.
But, I certainly would be making fun
of a "Typhoid Mary" roommate for it.

Ok, so he shops, he never washes his hands or groceries and will not take advice to do so. The fact is, it is about respect.

Respect indeed.
No argument there.

Humm well my son is staying with me, while stay at home orders are out.. And his gf has been staying here with us..

I'm still working and stop at the store when needed.. But they go to the store too..

So honestly has his gf been on total lockdown all this time if so then no harm at all.. If not then he is being exposed less then going to the store..or work..and it keeps him happy..

Not sure what kind of rules were set down.. But it is one of those things that if it bothers you then you need to address it and possibly a new roommate after lockdown..

My son, his gf & a friend right now are all gone for a few days to stay at a friend's deer lease.. And honestly, I have enjoyed the peace and quiet..

Thanks Txsgal. I messaged him and told him when he comes home we are talking.
I wonder how he would feel if I or my other flatmate flouted lockdown and were off doing whatever. To me, it wrong.

Talking is good, to clear up the unknowns. Even if anyone in the house
goes out and doesn’t take their shoes off at the door, you could be
unknowing bring the virus in. Set rules up as a household.

In all fairness though...

On the official list of essential activities,
getting laid, should be in the top 3.

There is no excuse for compromising someone else's
quarantine.

It depends if he's only seeing that person and how many people she's exposed to and if she practises hand hygiene now. Although I doubt that matters much when they're swapping bodily fluids anyways.

But like others said, we all get exposed more when we go out to the supermarket or any other place where people come. For instance the chip shop. And yes, only 4 are allowed in and only take-away, but still.

I think you can be too fussy too. If he doesn't practise decent hand hygiene now at this time I would get PO about that.

Oh, and come to think of it, if he doesn't practise proper hygiene NOW, then he never does.
I would not want a roommate who has different ideas concerning hygiene from me.

Find a different roomie or a different room, and fast.

This guy obviously has no respect for himself or others, and tragedy is sure to follow.

I would hear him the moment he left and meet him at the door when he came back.
He can pack his bags right then.