In one of the previews Ayame sees the hobo pissing, and pretty sure she is doing "things" with him, shortly after.
- That said there is some story that matches the previews for this specific hobo that explains why he is not completely disgusting "yet" anyway.
Here is a bit of a closeup for that hobo. He is not really that clean is he ? wearing a nasty rag and he is also dirty + not shaved for some time....
I don't really see him as neither good looking nor ripped. He have a normal build and a fucking huge penis!
But no there won't be any smegma or really disgusting things like that visible anyway. Story / dialogue there "might" be something.
Remember there will be other hobo's then just this one shown at the moment.