'coward' carries a negative connotation, therefore, that is not a right word to use to describe/bash men.
A better descriptive is 'courage,' and, a lack thereof. But guys christian are another 'c' word, and, psst, draw closer miladies, for this one though beware, for it might startle you, but guys, not ladies, think about sex every 7 minutes, so.....
Be thankful that the Lord is in CONTROL of their life, and, no, that is not the 'c' word . Guys who want their life after God, a life modeled after Paul, after David, after men of valor and men of mission, want to be, OH!, and don't forget the providence by God for Joseph, guys like that citizen to emulate too and, hmm, where was I?
Ah, yes, cautious. Men are this 'c' word around ladies they like because they realize their libido thinking is real and really there all the time and it is FRIGHTENING for a guy to dive in when he sees controlling his urges is going to be tough to do.
But, that said, a good guy of God will call on God's power when seeing a girl liked and he will be a gentleman to her and find courage deep within, but until that right message is received from within The guy will see a pretty and likely do what Joseph did, fleeeeeeeee .
A girl can help The good christian guy have courage by being brave once she sees he is a GREAT PERSONALITy, Lord leading you, miladies, by laughing at things he says or connecting with his saying, 'I like Toby Mac song, Lose My Soul.' This lets you go a number of directions in the coversation.
Communication is a two-way street and IF you already know guy is Christian then get bold and help his courage quicken.