"Verily, the hearing, and the sight, and the heart, of each of those ones will be questioned (by Allah).'' - The Holy Qur'an [17:36]
The acts of fornication is not merely restricted to sexual relationships but acts that can support the desires of him too are!!!
Prophet Mohammad (salaAllahu alaihi wa sallam) said:"The fornication of the two eyes is an evil glance. The fornication of the two ears is the obscene talk. The fornication of the tongue and hand is the touch and grasp. And the fornication of the two feet is the steps taken towards evil. The heart desires and longs and the private parts abide with or does contrary to it”. (Mishkat ul Masabih, Abu Dawood)