In Socionics, ISFjs are known for their moral rectitude--their sincere caring for others, their desire to 'do what's right' for people, teams, and communities. (For this reason, my ISFj Dad is my hero.) Most ISFjs I've met manifest a strong compulsion to do what's noble.
This said, I've noted a contradictory undercurrent among these relative goody-goodies of the Socion... Many of them exhibit a particular weakness--which often crosses the line into vice--for sex and women.
It's been my observation that some types exhibit certain vices more frequently than other types, e.g. betas and ESFps/INTps and drug abuse/alcoholism.) I believe that Socionics can help to explain this, (i.e. functional analysis.)
I know a male ISFj who dates handfuls of different women at once, spending obscene amount of money, juggling each of them. Indeed, among those that I've known who've engaged in extramarital affairs, and under-handed dealings in relationships, ISFjs feature prominently...
Furthermore, it seems to pain male ISFjs to be single for too long. Two ISFjs I've known have had serial marriages... To use a celebrity example, Johnny Carson was married 4 times..
Of course, male (and female) ISFjs can be suave in communication--Se & Fi's combination of strength and sensitivity--combines well with their usually athletic/attractive frames... Chics usually dig 'em.)
Male ESIs are perhaps the smoothest players in the Socion. They come across as caring and absolutely genuine; however, from what I've heard, oftentimes you won't know their true opinions of you until they kick you out of their beds in the morning, and stop returning your calls.
Male ISFjs talk about women with the feeling and bravado that they talk about their other favorite objects (I use the word 'objects' for a reason:') cars and motorcycles (Te dual-seeking, as they are...) Like the latter, women give male ESIs a "rush," and a sense of feeling "cool."
No offense to ISFjs--they're my second favorite type to my dual... Just something I noticed that I haven't see addressed here before.