To be honest using COVID to avoid kissing is just an excuse. If that's what it takes for you to pass COVID onto someone else then this pandemic would be long over. It's just used as an excuse not to provide the service.
If you're willing to take the risk and work as a WL or ML then you're also accepting the risk of getting COVID cause just by being in the same enclosed room. You're gonna pretty much get it regardless.
I love kissing too and it's just fascinating why a lot of WLs and MLs don't do it but are willing to drill a man's ass.