This is something I commissioned from Puyon, of Jakob in a seductive pose wearing latex pants.
This is not terribly unusual for an incubus, but it's not the sort of thing Jakob was comfortable with until after Daryil's ascension when the lust affinity started to get stronger.
The new, sexually-liberated Jakob has also grown his hair long like Daryil, and I must say it looks particularly fetching on him here.

Reposted with permission. I haven't done any edits to this apart from adding a signature, but I figure Puyon could do with the exposure. Puyon is currently open for commissions as of this writing.

The original is on FA here: http://www.furaffinity.net/view/22809237