A site showcasing couples kissing? Hmm, unconvinced. If I had a partner, kissing her is a personal moment, putting it out there in a compilation with other people ...feels a bit weird. I think most people prefer to keep those things on a personal social media page, or phone gallery / private places - Period (if someone took them for a public site, especially for commercial use, I'd probably complain ...but that's just me)
I consider this a struggle, as a domain and a vision (but again, genuinely hope I'm wrong). Kiss Pictures / Kiss Pics ...I'd be thrilled, but a different use than mentioned