It is only human for you to enjoy the excitement that your big cock creates among guys you allow to watch you jerk off. I would say, just go with it.
As a male bisexual, I initially had difficulty understanding how someone who considered himself 100% straight could get off on stroking his cock and cumming in front of other men. But after my own experience with camming, I am convinced that a number of guys truly fit that profile and are not merely deluding themselves.
And I am very glad that such guys do exist. I for one really enjoy telling a straight guy, as he jerks off, what a great cunt-fucking cock he has.