I had a friend who was into casual sex a lot, and a good number of men who showed up TO HER APARTMENT didn't bother taking a shower or even wearing a clean T-shirt. I vividly remember how she described one guy who showed up looking 5 sizes bigger (as in he used a super old photo on himself on a dating app), unshaved, with a dirty T-shirt that had holes, AND smelt like he hasn't showered in a week.
Let me repeat that. A man scored a hook-up. He got invited to a girl's place, meaning he could have gotten away with living with parents despite his mature age. All he had to do was wear clean clothes and shower. But nope! That was too much to ask.
Obviously, my friend told him to take a hike. But how uninterested does one have to be in sex... which is probaby hard to come by for them... that they don't even care to shower. Ugh.