a lecherous man is someone who leers at people with the sole thought of sex on his mind. usually dribbles and has manic glints in his eyes. often a pervert.
One who licks the cliterous as fast and as effectively as possible with the least amount of energy used.
"Oooooohhhhhhhhhhhhhhhhh aaaaaaaaaaaahhhh jonny you are the best at licking my clit and you have set it on FIRE but you still haven't noticed that i'm a man YET!"