BTW...I don't know if this applies to all ISTP's, BUT I personally HATE talking on the phone for an extended period of time especially if it's day in day out with the same person...like my mom who calls very very often. It's actually really annoying to me...kinda seems needy which is not what I want to deal with. Hope that may help too.
Does your man play competitive Ultimate with a team back there? If so, men's or coed? I used to play men's here but I'm too old to keep up with the youngsters anymore so...now coed. But...no matter my age...it still feels great to "layout for the disc", especially if it's a defensive block.