I´m not sure if there is any exception for what I´m about to say, but I think it´s about the verb "to be".  The suffix -sin stands for either "are" or "is" there, so;

adjective case

second person singular

the most .. man is you > with suffix

you are the most ... man > with suffix

third person singular(explained in detail above)

the most .. man is him > no suffix needed but could be used (en .. adam o/-dur)

he is the most .. man> no suffix needed, but could be used (o en .. adam/-dýr)

I understand the above and I´m not disputing that. I´m just a bit confused, apparently I need to re-examine the way I had it worked out in my head lol. I could swear too that I´ve seen sentences in the translation forum that end in sen, but maybe not. Ah well, I´ll steer clear of it for now I guess.

Apparently, you need to rub some lotion on those delicate hands

That´s your fantasy, not mine.  

What fantasy wouldthat be delicate hands? You rubbing lotion on your hands?

I offer a free foot rub with avocado scents and baby oil... how is that.

If that´s what puts a smile on your face ...who am I to judge?