Answer
(Fatwa 645=605/B)
Islam disallows every thing that arouses sensual feelings. Thus looking at non-maharam is disallowed since it causes sexual urge. Likewise, it is forbidden for men to be alone with non-mahram women since it also falls in the same category. So, kissing of girls to each other will be regarded as haraam as it also awakens sexual desire and this is actually a sign of approaching Qiyamah (Doomsday); as in Hadith it is mentioned that women will indulge in homosexuality.
The justification of the kissing as part of complete love is nothing but a satanic deception and thus is completely avoidable. As far as the Hadith of the Prophet (Sallallahu Alaihi Wasallah) biting the tongue of Zaid bin Haritha is concerned we are sorry that we are not aware of it. Please, provide us the reference of the same.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband