More Bikes..?

lately mate of mine keep luring me into off-road biking..( out come of having coffee with devils) but not too sure about these. spending extra for another dirt bike on top of what i currently owned right now, this would be a burden to own..just wander how many bikes a man should have..? will it be practical to own more than what we can ride on..? still not too sure about these...well..maybe one of these day when i'm in a stupid/mad mood i might just grab another one without consider too much....sometime men will do stupid things..