A few thoughts.
1. How would you feel if the tables were turned and it was your wife/daughter that was pinned down?
2.What if you were pinned down by a gay man, as a heterosexual man that could be pretty stressful. Perhaps the chap concerned was gay (despite claiming to have a GF.)
3. The chap concerned could have suffered secual abuse or rape when younger. PTSD from combat would have brought a huge amount of sympathy and understanding. PTSD from sexual abuse can be just as debilitating but comes with a HUGE amount of shame.
Cut the guy from slack. He wasn’t happy for his own reasons that should not need justifying to others. For those thinking him over-sensitive, please be mindful that you are viewing through your own eyes.
Consenting.
Sexually active.
Willing to have casual sex.
Not in a relationship or bothered about infidelity.
To understand someone, walk a mile in their shoes....
HG