Why does my boyfriend touch me and kiss me with tongue?

Anonymous
My boyfriend likes to kiss me with tongue and I like it...but I want to know why guys like it so much. he even grabs my butt ( I let him do it in private) and he holds me and tells me he'd do anything for me( he told me he'd wait to have sex till were married cause that what I want) but why does he do these things especially the tongue thing lol
Why does my boyfriend touch me and kiss me with tongue?
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