MPs can be "named and shamed", have the whip withdrawn (as it were) but they can't be sacked, unless they commit a criminal offence and are jailed. They just become independents.
We are literally paying for this man to watch porn at work, in front of women. I think in most jobs that would be seen as gross misconduct. Can't be sacked? Then he should do the "right, honourable" thing and resign ...