have you ever kissed someone you don’t love?

if yes, you’ve got to help me answer this question. why?

you see, someone close to me kissed someone he didn’t love, and I didn’t expect that and quite surprised because I know he loved someone else much more then the girl he kissed. what do you think? is it okay to kiss someone while you love someone else? and why do you think you’d do that?

is it because curiosity? is it being realistic (because you can’t kiss the one you love the most)?