medyo may halong psychological issue yan TS. technically, ang lalake kaya niya tigasan at labasan pagkatapos ng "refractory period". ang tagal nito, nag-vary or iba iba sa bawat tao, pero as a guide, 15minutes pag binata (puberty), then tumatagal ito. ang ED naman, in the strictest sense ay pagkawala ng abilidad na maintain ang erection until nakatapos ang sexual act. hindi ito ED pag naka 1 round ka na. Kaya ko nasabing may halong psychological, or possible na emotional, kasi ang sexual stimulation at foreplay ay malaking bagay sa quality ng erection mo. ikaw na mismo nagsabi TS na matigas pag sobra excited ("one night stand" hindi ba?), so this affects the sexual need you seek from your GF, kasi napuno ng iba...
may ibang way to please your GF without going through 4-5 rounds ng pagtalik, but that would call for another thread...
isang factor din dito ay stress at emotional baggage... pag madami ka iniisip, pansin mo, mahirap ka tigasan... (sa simpleng salita mind you...), factor din ang physical exertion, stamina and exhaustion. Pag pagod ka, mahirap tumayo yan. kung physically fit ka, mataas ang stamina level mo, and you can perform and deliver the desired sexual performance longer than expected, AND POSSIBLY, the number of "rounds"...
kung mahal ka ng GF mo pre, hindi dapat issue yung "number of times" ng orgasm mo TS.. kung issue yun, e di mag focus ka na ipleasure siya in some other sexually stimulating way, until makahabol ang erection mo, at tigasan ka ulit...