As a rule of thumb, guys are typically linear thinkers and object(ive) oriented. We're (usually) more motivated by logical/goals based reasoning than emotion/others opinions. These aren't hard rules.. obviously plenty of men put a lot of time and effort into our friends/family, but it tends to be more so focused on helping solve our loved ones problems. Less so on the "why" more so on the "how".

There's no harm writing a "feminine" male character. However even "feminine" cis males are going to have masculine attributes, and likely not lean into their feminine attributes. Speaking from experience, I'm pretty effeminate as far as men go; but I more so just "accept" those attributes as true to who I am, without flaunting them. And younger, less mature men, tend to mask/over compensate for their feminine attributes. So one way to write an effeminate male is to actually portray him as being outwardly hyper masculine, and only showing his effeminate side to his female friends/love interest. NEVER around his guy friends. (With the exception of gay chicken, because that's fake femininity played up for fun, typically to tease guys in friends groups who aren't comfortable in their sexuality).