My ejaculate volume decreases each time -- as does the distance it travels if I do not ejaculate into an orifice -- It has also decreased with age (meds?)
The one exception to this was the time I ejaculated 13 times in 36 hours - I was in my late 40s and all involved another man or group of men .
Load #8 was caused by a blow job where the guy did not want to take my load -- when I knew I was at the point of no return, I warned him and took my cock out of his mouth -- I was standing and he kept jerking me as I shot. That load, load #8 in this 36 hours of fun, was massive and traveled 6ft -- I was astounded and thought "where did that come from" !!
By load 13, I was ejaculating a bead of semen at the end of my urethra -- I was totally spent & drained!