Shark,
IF you get nervous and things aren't happening for you, just slow the fuck down, take a chill pill my man. You don't have to get all fucked up over it, it's a good way to ask the chick for a little head or whatever is your thing. Have her tell you what she wants you to do to her, talk dirty, or another thing s to tell her you wat to watch her touch hrerself. Whatever gets your rocks off.
If she is worth a shit in bed, she'll rub you up again, suck you for a minute, something, make it part of the whole session. Hell, your not a machine! She should be happy to "lend a hand" ( or mouth ).
Also, you can stall for time by basicaly starting all over again, starting with the kissing. That's what I do at 47, things aren't what they used to be most of the time, but I get really aroused by kissing and playing with big titties, that's just me. After a short while, bingo, I'm ready for round 2, or 3, or whatever.
Get yourself out of the "I've got to keep going and be the stud she has never had" mentality. A womans brain is her biggest sex organ, she'll resond to mental sex, believe me. Slow the fuck down, touch her body, feel her sexuality with your toungue, enjoy her feminity. You'll be fine....
no charge for the first one, $120.00 for the rest. lol