GHB is the best drug you can use for this matter....i???ts a powerfull anxiolitic that has some asweme vasodialating propertes, it enhances penis sensivity and blood flow drastically, gives ramdom erection and makes you last longer. plus it enhances both mental libido and penis" libido. with GHB i was able to get an strong erection even while on some LIMP DICK drugs.... nothing beats ghb for this