Thanks Zebu and Ironwolf.
Here we go.
Semrus 
(all picture credit goes to the artist, not me)
Tribe: Pagans
Divine level: 10
Prefered Avatars: See above
Elements and powers: The powers of Semrus manifests in delirious states, often in fits of passion and excessive emotion. Thus, Semrus is present in many rituals, be they dedicated to him or no. Also, during sex, before a battle, in theatrics or a performance, these are when Semrus makes his presence known to those who follow him.
He often takes the form of one of his followers to walk among them, anonymously, his god-powers absent to him in this form. He likes visiting, wooing and bedding the prettiest of his female followers, arrangeing romantic matches between favourites of his, and starting fights. He is prayed to on the eve of battle, and usually before a planned bout of lovemaking.
Semrus becomes a little more powerful everytime a mutual orgasm is dedicated to him, a death of a non-Pagan, non Semrus-follower in battle is dedicated to him, and a feast held by a large group of his followers is dedicated to him.
the Pure Prayer that Created you:
Pagans, offshoots of the Celtic tribe, had moved to their own island, free of the binds of other tribes, and free to create their own utopia of wild fantasies and passionate creativity. However, after long skirmishes with other tribes better armed then they, the Pagans were underpopulated, and as a result couldn't hold onto their fields of crops and livestock. In a final, desperate prayer to any who would listen, the Pagans created a huge, ritualised play about their journey as a tribe, a massive, colourful and spectacular epic called the Semmarach, a last plea to any divine force that would heed their call.
Semrus answered their plea and warmed to the Pagans' heartfelt performance, revelled in their lusts and bright passions. He was present in every skirmish from thenceforth, aiding the Pagans in subtle ways, pouring into their warrior's hearts at the starts of battle to empower them, trickling into their adult's loins encouraging more frequent and rapid matings which resulted in more Pagans being born, and seeping into their bellies, inspiring more exciting feasting which begot wider ranges of hunting.
His avatar is a mixture of lust and passion embodied, a leering and dangerously handsome young man filled with fruitful loins and the urge to fight gloriously with any enemies of his beloved tribe. The avatar has the power of wind at his feet, giving him the power to leap great distances and glide temporarily.
The Semmarach is performed, duly and gladly, every year deep in the forests of Semrus' island.