No. That is a space marine reclaiming the heritage of a super-soldier, to make certain that his genetic awesomeness can be passed down to the next generation of super-soldiers.
Given that the Adeptus Astartes are hypermasculine supersoldiers and the only women around are virginal warrior nuns, it's a safe bet that Space Marines totally bum each other off constantly.
Around this time this game was made there was a Warhammer 40,000 out called "Space Marine" (because this is before the Black Library published millions of books about Space Marines).
In it, there's a scene where three recruits have the symbol of the Imperial Fists (which is, as you might guess, a fist) branded on their buttocks by their sergeant, after a naked hazing exercise.
It was. Every other missions has unlimited alien spawn points you have to constantly keep an eye out for. Eventually you would have to make a break for it past them and that's when shit hit the fan. The last mission had a set number of aliens and if you sat around eventually they'd come to you.