I agree with YKM and all said above by Jordey et al.. Also there's a "simple" (ok not so simple, since many mistakes are made here) solution to minimize the draining effect: train smart, "listen to your body" (I know, a commonplace but it holds true nonetheless, at least for the more experienced lifter) and - very important - eat and sleep enough! thus I can't concur with Samuriajack that you should stick to cardio or moderate fitness training. If you have a deficit of nutrients or rest, then it doesn't come as a surprise that not only your PE but your whole everyday life will suffer. And before someone concludes from his weakened condition that Heavy strength training is the cause to blame, he should first check his whole approach to strength sports and his training regime, his caloric intake etc., so he'll much more likely find the reason there and not in the fact, that he does practice this sport.
@Zam, my friend: also I wanted to make clear again that I don't have any EQ issues. As a matter of fact my EQ has been brilliant for weeks now. Can't blame you for losing the central propositions, that I've made in the op, out of sight, since the thread has developed on it's own and in very different directions, but I wanted to reiterate that once again to avoid the impression that I implied at some point that EQ suffered from Strength training. If it suffers at times then either because of 1.girth training (most common phenomenon in my case that would deserve an own thread) or 2.tense PC muscles (which I attribute to Kegels and which isn't a problem anymore since I abandoned Kegels. This was one of the reasons for starting this thread).
